Set sha for checkout properly

.github/workflows/gitlab_ci.yml

@@ -45,12 +45,12 @@ jobs:
           (github.event_name == 'push') ||
           (github.event_name == 'schedule')
         run: exit 0
-      - name: Fail for other triggers
-        if: >-
-          (github.event_name != 'push') &&
-          (github.event_name != 'schedule') &&
-          (github.event_name != 'pull_request_target')
-        run: exit 1
+      # - name: Fail for other triggers
+      #   if: >-
+      #     (github.event_name != 'push') &&
+      #     (github.event_name != 'schedule') &&
+      #     (github.event_name != 'pull_request_target')
+      #   run: exit 1
 
   mirror_to_gitlab:
     runs-on: ubuntu-latest
@@ -65,10 +65,21 @@ jobs:
     needs:
       - check_permission
     steps:
+      - name: set proper sha
+        run: |
+          echo "${{ github.event_name }}"
+          if [ "${{ github.event_name }}" == 'push' ] || [ "${{ github.event_name }}" == 'schedule' ]
+          then
+            echo "USED_SHA=${{ github.sha }}" >> "$GITHUB_ENV"
+          fi
+          if [ "${{ github.event_name }}" == 'pull_request_target' ]
+          then
+            echo "USED_SHA=${{ github.event.pull_request.head.sha }}" >> "$GITHUB_ENV"
+          fi
       - name: Checkout
         uses: actions/checkout@v3
         with:
-          ref: "${{ github.event.pull_request.head.sha }}"
+          ref: "${{ env.USED_SHA }}"
           persist-credentials: false
       - name: Mirror and wait for Gitlab-CI
         uses: jakob-fritz/github2lab_action@Iss35_mirror_pr