Rebuild cache after Geo repository update

app/workers/geo_repository_update_worker.rb

@@ -9,6 +9,7 @@ class GeoRepositoryUpdateWorker
     @project = Project.find(project_id)
 
     fetch_repository(clone_url)
+    ProjectCacheWorker.perform_async(@project.id)
   end
 
   private

app/workers/project_cache_worker.rb

@@ -32,7 +32,11 @@ class ProjectCacheWorker
       return
     end
 
-    update_caches(project_id)
+    if Gitlab::Geo.secondary?
+      update_geo_caches(project_id)
+    else
+      update_caches(project_id)
+    end
   end
 
   def update_caches(project_id)
@@ -48,6 +52,18 @@ class ProjectCacheWorker
     end
   end
 
+  # Geo should only update Redis based cache, as data store in the database
+  # will be updated on primary and replicated to the secondaries.
+  def update_geo_caches(project_id)
+    project = Project.find(project_id)
+
+    return unless project.repository.exists?
+
+    if project.repository.root_ref
+      project.repository.build_cache
+    end
+  end
+
   def try_obtain_lease_for(project_id)
     self.class.lease_for(project_id).try_obtain
   end