From e3a5a36fc818cc968eef59817df859eb175fb5b2 Mon Sep 17 00:00:00 2001
From: GitLab Bot <gitlab-bot@gitlab.com>
Date: Mon, 8 May 2023 23:10:52 +0000
Subject: Add latest changes from gitlab-org/gitlab@15-9-stable-ee

---
 app/models/merge_request.rb | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'app/models/merge_request.rb')

diff --git a/app/models/merge_request.rb b/app/models/merge_request.rb
index 485ca3a3850..f3488f6ea60 100644
--- a/app/models/merge_request.rb
+++ b/app/models/merge_request.rb
@@ -1478,6 +1478,7 @@ class MergeRequest < ApplicationRecord
 
   def fetch_ref!
     target_project.repository.fetch_source_branch!(source_project.repository, source_branch, ref_path)
+    expire_ancestor_cache
   end
 
   # Returns the current merge-ref HEAD commit.
@@ -2037,6 +2038,10 @@ class MergeRequest < ApplicationRecord
     self.draft = draft?
   end
 
+  def expire_ancestor_cache
+    project.repository.expire_ancestor_cache(target_branch_sha, diff_head_sha)
+  end
+
   def missing_report_error(report_type)
     { status: :error, status_reason: "This merge request does not have #{report_type} reports" }
   end
-- 
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