Fix test workflow

Author: zklaus

.github/workflows/checkout-test.yml

@@ -111,8 +111,7 @@ jobs:
         uses: ./.github/actions/checkout/
         with:
           additional-fetch-refs: |
-            refs/tags/test-data/v2/tag1:refs/tags/test-data/v2/tag1
-            refs/tags/test-data/v2/tag2:refs/tags/test-data/v2/tag2
+            refs/heads/main
 
       # Sparse checkout
       - name: Sparse checkout