Merge branch 'set-gl-protocol-on-rebase' into 'master'

Set the correct `GL_PROTOCOL` in the environment when rebasing.

@stanhu I tested the changes locally and they seem to work.

I'm not sure how to add tests for this, however.

See merge request !691

CHANGELOG-EE

@@ -3,6 +3,7 @@ v 8.12.0 (Unreleased)
 
 v 8.11.3 (Unreleased)
   - [ES] Add logging to indexer
+  - Set the correct `GL_PROTOCOL` when rebasing !691
 
 v 8.11.2
   - Additional documentation on protected branches for EE

app/services/merge_requests/rebase_service.rb

@@ -107,7 +107,7 @@ module MergeRequests
     end
 
     def git_env
-      { 'GL_ID' => Gitlab::GlId.gl_id(current_user) }
+      { 'GL_ID' => Gitlab::GlId.gl_id(current_user), 'GL_PROTOCOL' => 'web' }
     end
   end
 end