Merge branch 'sh-update-git-config-for-forks' into 'master'

Ensure .git/config is updated for forks

See merge request gitlab-org/gitlab!35305

app/models/project.rb

@@ -1798,6 +1798,7 @@ class Project < ApplicationRecord
     after_create_default_branch
     join_pool_repository
     refresh_markdown_cache!
+    write_repository_config
   end
 
   def update_project_counter_caches

changelogs/unreleased/sh-update-git-config-for-forks.yml

+---
+title: Ensure .git/config is updated for forks
+merge_request: 35305
+author:
+type: fixed

spec/models/project_spec.rb

@@ -4663,6 +4663,7 @@ RSpec.describe Project do
       expect(project).to receive(:refresh_markdown_cache!)
       expect(InternalId).to receive(:flush_records!).with(project: project)
       expect(DetectRepositoryLanguagesWorker).to receive(:perform_async).with(project.id)
+      expect(project).to receive(:write_repository_config)
 
       project.after_import
     end