diff --git a/server/azure-pipelines.migrate.yaml b/server/azure-pipelines.migrate.yaml
index a7a2865f9..a1ef776c2 100644
--- a/server/azure-pipelines.migrate.yaml
+++ b/server/azure-pipelines.migrate.yaml
@@ -24,8 +24,7 @@ steps:
       targetType: inline
       script: |
         FORKURI=$(curl -X GET "https://api.github.com/repos/$BUILD_REPOSITORY_NAME/pulls/$SYSTEM_PULLREQUEST_PULLREQUESTNUMBER" | jq -r '.head.repo.clone_url')
-        git clone "$FORKURI" .
-        git checkout "$SYSTEM_PULLREQUEST_SOURCEBRANCH"
+        git clone --single-branch -b "$SYSTEM_PULLREQUEST_SOURCEBRANCH" "$FORKURI" .
 
   - task: Bash@3
     displayName: abort if just migrated