MR branch link now links to tree instead of commits

app/presenters/merge_request_presenter.rb

@@ -94,7 +94,7 @@ class MergeRequestPresenter < Gitlab::View::Presenter::Delegated
 
     if source_branch_exists?
       namespace = link_to(namespace, project_path(source_project))
-      branch = link_to(branch, project_commits_path(source_project, source_branch))
+      branch = link_to(branch, project_tree_path(source_project, source_branch))
     end
 
     if for_fork?

changelogs/unreleased/mr-branch-link-use-tree.yml

@@ -0,0 +1,4 @@
+---
+title: MR branch link now links to tree instead of commits
+merge_request:
+author:

spec/presenters/merge_request_presenter_spec.rb

@@ -363,4 +363,17 @@ describe MergeRequestPresenter do
       end
     end
   end
+
+  describe '#source_branch_with_namespace_link' do
+    subject do
+      described_class.new(resource, current_user: user).source_branch_with_namespace_link
+    end
+
+    it 'returns link' do
+      allow(resource).to receive(:source_branch_exists?) { true }
+
+      is_expected
+        .to eq("<a href=\"/#{resource.source_project.full_path}/tree/#{resource.source_branch}\">#{resource.source_branch}</a>")
+    end
+  end
 end