fetch?

Author: Happypig375

.github/workflows/Label.yml

@@ -8,12 +8,11 @@ jobs:
     - uses: actions/checkout@v6
       with:
         submodules: recursive
-        ref: ${{ github.event.pull_request.head.sha }} # Check out the pull request HEAD commit instead of the merge commit
     - name: If there are changes in PublicApi.Shipped.txt, fail the workflow
       if: github.head_ref != 'action/ship-publicapi' # Same branch name specified in Release.yml
       run: |
-        git fetch origin ${{ github.base_ref }}
-        $changes = git diff --numstat --shortstat origin/${{ github.base_ref }}...HEAD -- '**/PublicApi.Shipped.txt'
+        git fetch origin HEAD # By default, actions/checkout does not fetch commit history, we fetch it here
+        $changes = git diff --numstat --shortstat ${{ github.base_ref }}...HEAD -- '**/PublicApi.Shipped.txt'
         Write-Output "$changes"
         if ($changes) {
           Write-Error "Changes detected in PublicApi.Shipped.txt files. Public API changes must be shipped through the release process, not in regular pull requests."