fix(ci): testing local state in push check

Testing the push should only be done on the remote/origin

Author: nbrugger-tgm

.github/workflows/test_action.yml

@@ -32,8 +32,15 @@ jobs:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           commit: false
           push: false
+      - uses: actions/checkout@v2
+        with:
+          ref: ${{github.event.pull_request.head.ref}} 
+          repository: ${{github.event.pull_request.head.repo.full_name}}
+          fetch-depth: 0  # ensures that tags are fetched, seems to be needed
+          path: new_head
       - name: Test push
         run: |
+          cd new_head
           last_pushed_commit=$(git rev-parse ${{ github.head_ref }})
           echo "Commit sha on origin : $last_pushed_commit"
           if [[ $last_pushed_commit != ${{steps.capture.outputs.commit}} ]]; then