diff --git a/changelogs/unreleased/remote_user.yml b/changelogs/unreleased/remote_user.yml
new file mode 100644
index 00000000000..75a941fa95f
--- /dev/null
+++ b/changelogs/unreleased/remote_user.yml
@@ -0,0 +1,4 @@
+---
+title: Add username as GL_USERNAME in hooks
+merge_request:
+author:
diff --git a/lib/gitlab/git/hook.rb b/lib/gitlab/git/hook.rb
index 208e4bbaf60..8ccb3e64636 100644
--- a/lib/gitlab/git/hook.rb
+++ b/lib/gitlab/git/hook.rb
@@ -22,22 +22,22 @@ module Gitlab
         File.exist?(path)
       end
 
-      def trigger(gl_id, oldrev, newrev, ref)
+      def trigger(gl_id, gl_username, oldrev, newrev, ref)
         return [true, nil] unless exists?
 
         Bundler.with_clean_env do
           case name
           when "pre-receive", "post-receive"
-            call_receive_hook(gl_id, oldrev, newrev, ref)
+            call_receive_hook(gl_id, gl_username, oldrev, newrev, ref)
           when "update"
-            call_update_hook(gl_id, oldrev, newrev, ref)
+            call_update_hook(gl_id, gl_username, oldrev, newrev, ref)
           end
         end
       end
 
       private
 
-      def call_receive_hook(gl_id, oldrev, newrev, ref)
+      def call_receive_hook(gl_id, gl_username, oldrev, newrev, ref)
         changes = [oldrev, newrev, ref].join(" ")
 
         exit_status = false
@@ -45,6 +45,7 @@ module Gitlab
 
         vars = {
           'GL_ID' => gl_id,
+          'GL_USERNAME' => gl_username,
           'PWD' => repo_path,
           'GL_PROTOCOL' => GL_PROTOCOL,
           'GL_REPOSITORY' => repository.gl_repository
@@ -80,9 +81,14 @@ module Gitlab
         [exit_status, exit_message]
       end
 
-      def call_update_hook(gl_id, oldrev, newrev, ref)
+      def call_update_hook(gl_id, gl_username, oldrev, newrev, ref)
         Dir.chdir(repo_path) do
-          stdout, stderr, status = Open3.capture3({ 'GL_ID' => gl_id }, path, ref, oldrev, newrev)
+          stdout, stderr, status = Open3.capture3(
+            {
+              'GL_ID' => gl_id,
+              'GL_USERNAME' => gl_username
+            },
+            path, ref, oldrev, newrev)
           [status.success?, (stderr.presence || stdout).gsub(/\R/, "<br>").html_safe]
         end
       end
diff --git a/lib/gitlab/git/hooks_service.rb b/lib/gitlab/git/hooks_service.rb
index ea8a87a1290..c327e9b1616 100644
--- a/lib/gitlab/git/hooks_service.rb
+++ b/lib/gitlab/git/hooks_service.rb
@@ -5,12 +5,13 @@ module Gitlab
 
       attr_accessor :oldrev, :newrev, :ref
 
-      def execute(committer, repository, oldrev, newrev, ref)
-        @repository = repository
-        @gl_id      = committer.gl_id
-        @oldrev     = oldrev
-        @newrev     = newrev
-        @ref        = ref
+      def execute(pusher, repository, oldrev, newrev, ref)
+        @repository  = repository
+        @gl_id       = pusher.gl_id
+        @gl_username = pusher.name
+        @oldrev      = oldrev
+        @newrev      = newrev
+        @ref         = ref
 
         %w(pre-receive update).each do |hook_name|
           status, message = run_hook(hook_name)
@@ -29,7 +30,7 @@ module Gitlab
 
       def run_hook(name)
         hook = Gitlab::Git::Hook.new(name, @repository)
-        hook.trigger(@gl_id, oldrev, newrev, ref)
+        hook.trigger(@gl_id, @gl_username, oldrev, newrev, ref)
       end
     end
   end
diff --git a/lib/gitlab/git/user.rb b/lib/gitlab/git/user.rb
index e142992f324..cb1af5f3b7c 100644
--- a/lib/gitlab/git/user.rb
+++ b/lib/gitlab/git/user.rb
@@ -1,20 +1,21 @@
 module Gitlab
   module Git
     class User
-      attr_reader :name, :email, :gl_id
+      attr_reader :username, :name, :email, :gl_id
 
       def self.from_gitlab(gitlab_user)
-        new(gitlab_user.name, gitlab_user.email, Gitlab::GlId.gl_id(gitlab_user))
+        new(gitlab_user.username, gitlab_user.name, gitlab_user.email, Gitlab::GlId.gl_id(gitlab_user))
       end
 
-      def initialize(name, email, gl_id)
+      def initialize(username, name, email, gl_id)
+        @username = username
         @name = name
         @email = email
         @gl_id = gl_id
       end
 
       def ==(other)
-        [name, email, gl_id] == [other.name, other.email, other.gl_id]
+        [username, name, email, gl_id] == [other.username, other.name, other.email, other.gl_id]
       end
     end
   end
diff --git a/spec/lib/gitlab/git/hook_spec.rb b/spec/lib/gitlab/git/hook_spec.rb
index 0ff4f3bd105..2fe1f5603ce 100644
--- a/spec/lib/gitlab/git/hook_spec.rb
+++ b/spec/lib/gitlab/git/hook_spec.rb
@@ -14,6 +14,7 @@ describe Gitlab::Git::Hook do
     let(:repo_path) { repository.path }
     let(:user) { create(:user) }
     let(:gl_id) { Gitlab::GlId.gl_id(user) }
+    let(:gl_username) { user.username }
 
     def create_hook(name)
       FileUtils.mkdir_p(File.join(repo_path, 'hooks'))
@@ -42,6 +43,7 @@ describe Gitlab::Git::Hook do
           let(:env) do
             {
               'GL_ID' => gl_id,
+              'GL_USERNAME' => gl_username,
               'PWD' => repo_path,
               'GL_PROTOCOL' => 'web',
               'GL_REPOSITORY' => gl_repository
@@ -59,7 +61,7 @@ describe Gitlab::Git::Hook do
                 .with(env, hook_path, chdir: repo_path).and_call_original
             end
 
-            status, errors = hook.trigger(gl_id, blank, blank, ref)
+            status, errors = hook.trigger(gl_id, gl_username, blank, blank, ref)
             expect(status).to be true
             expect(errors).to be_blank
           end
@@ -72,7 +74,7 @@ describe Gitlab::Git::Hook do
             blank = Gitlab::Git::BLANK_SHA
             ref = Gitlab::Git::BRANCH_REF_PREFIX + 'new_branch'
 
-            status, errors = hook.trigger(gl_id, blank, blank, ref)
+            status, errors = hook.trigger(gl_id, gl_username, blank, blank, ref)
             expect(status).to be false
             expect(errors).to eq("error message from the hook<br>error message from the hook line 2<br>")
           end
@@ -86,7 +88,7 @@ describe Gitlab::Git::Hook do
         blank = Gitlab::Git::BLANK_SHA
         ref = Gitlab::Git::BRANCH_REF_PREFIX + 'new_branch'
 
-        status, errors = hook.trigger(gl_id, blank, blank, ref)
+        status, errors = hook.trigger(gl_id, gl_username, blank, blank, ref)
         expect(status).to be true
         expect(errors).to be_nil
       end
diff --git a/spec/lib/gitlab/git/hooks_service_spec.rb b/spec/lib/gitlab/git/hooks_service_spec.rb
index d4d75b66659..51e4e3fdad1 100644
--- a/spec/lib/gitlab/git/hooks_service_spec.rb
+++ b/spec/lib/gitlab/git/hooks_service_spec.rb
@@ -1,7 +1,7 @@
 require 'spec_helper'
 
 describe Gitlab::Git::HooksService, seed_helper: true do
-  let(:user) { Gitlab::Git::User.new('Jane Doe', 'janedoe@example.com', 'user-456') }
+  let(:user) { Gitlab::Git::User.new('janedoe', 'Jane Doe', 'janedoe@example.com', 'user-456') }
   let(:repository) { Gitlab::Git::Repository.new('default', TEST_REPO_PATH, 'project-123') }
   let(:service) { described_class.new }
 
diff --git a/spec/lib/gitlab/git/user_spec.rb b/spec/lib/gitlab/git/user_spec.rb
index 0ebcecb26c0..ab64b041187 100644
--- a/spec/lib/gitlab/git/user_spec.rb
+++ b/spec/lib/gitlab/git/user_spec.rb
@@ -1,22 +1,24 @@
 require 'spec_helper'
 
 describe Gitlab::Git::User do
+  let(:username) { 'janedo' }
   let(:name) { 'Jane Doe' }
   let(:email) { 'janedoe@example.com' }
   let(:gl_id) { 'user-123' }
 
-  subject { described_class.new(name, email, gl_id) }
+  subject { described_class.new(username, name, email, gl_id) }
 
   describe '#==' do
-    def eq_other(name, email, gl_id)
-      eq(described_class.new(name, email, gl_id))
+    def eq_other(username, name, email, gl_id)
+      eq(described_class.new(username, name, email, gl_id))
     end
 
-    it { expect(subject).to eq_other(name, email, gl_id) }
+    it { expect(subject).to eq_other(username, name, email, gl_id) }
 
-    it { expect(subject).not_to eq_other(nil, nil, nil) }
-    it { expect(subject).not_to eq_other(name + 'x', email, gl_id) }
-    it { expect(subject).not_to eq_other(name, email + 'x', gl_id) }
-    it { expect(subject).not_to eq_other(name, email, gl_id + 'x') }
+    it { expect(subject).not_to eq_other(nil, nil, nil, nil) }
+    it { expect(subject).not_to eq_other(username + 'x', name, email, gl_id) }
+    it { expect(subject).not_to eq_other(username, name + 'x', email, gl_id) }
+    it { expect(subject).not_to eq_other(username, name, email + 'x', gl_id) }
+    it { expect(subject).not_to eq_other(username, name, email, gl_id + 'x') }
   end
 end
diff --git a/spec/lib/gitlab/workhorse_spec.rb b/spec/lib/gitlab/workhorse_spec.rb
index 5708aa6754f..e56e2df8376 100644
--- a/spec/lib/gitlab/workhorse_spec.rb
+++ b/spec/lib/gitlab/workhorse_spec.rb
@@ -182,7 +182,12 @@ describe Gitlab::Workhorse do
     let(:repo_path) { repository.path_to_repo }
     let(:action) { 'info_refs' }
     let(:params) do
-      { GL_ID: "user-#{user.id}", GL_REPOSITORY: "project-#{project.id}", RepoPath: repo_path }
+      {
+        GL_ID: "user-#{user.id}",
+        GL_USERNAME: user.username,
+        GL_REPOSITORY: "project-#{project.id}",
+        RepoPath: repo_path
+      }
     end
 
     subject { described_class.git_http_ok(repository, false, user, action) }
@@ -191,7 +196,12 @@ describe Gitlab::Workhorse do
 
     context 'when is_wiki' do
       let(:params) do
-        { GL_ID: "user-#{user.id}", GL_REPOSITORY: "wiki-#{project.id}", RepoPath: repo_path }
+        {
+          GL_ID: "user-#{user.id}",
+          GL_USERNAME: user.username,
+          GL_REPOSITORY: "wiki-#{project.id}",
+          RepoPath: repo_path
+        }
       end
 
       subject { described_class.git_http_ok(repository, true, user, action) }
diff --git a/spec/models/repository_spec.rb b/spec/models/repository_spec.rb
index ab81d39691b..869cf51f6a2 100644
--- a/spec/models/repository_spec.rb
+++ b/spec/models/repository_spec.rb
@@ -1679,11 +1679,11 @@ describe Repository do
         tag_sha = tag.target
 
         expect(pre_receive_hook).to have_received(:trigger)
-          .with(anything, anything, commit_sha, anything)
+          .with(anything, anything, anything, commit_sha, anything)
         expect(update_hook).to have_received(:trigger)
-          .with(anything, anything, commit_sha, anything)
+          .with(anything, anything, anything, commit_sha, anything)
         expect(post_receive_hook).to have_received(:trigger)
-          .with(anything, anything, tag_sha, anything)
+          .with(anything, anything, anything, tag_sha, anything)
       end
     end
   end