diff --git a/lib/gitlab/backend/grack_auth.rb b/lib/gitlab/backend/grack_auth.rb
index c921ec0d50b..a2d15d57034 100644
--- a/lib/gitlab/backend/grack_auth.rb
+++ b/lib/gitlab/backend/grack_auth.rb
@@ -81,7 +81,7 @@ module Grack
       end
       # Need to reset seek point
       @request.body.rewind
-      /refs\/heads\/([\w\.-]+)/.match(input).to_a.first
+      /refs\/heads\/([\w\.-]+)/.match(input).to_a.last
     end
 
     def project