checkout to proper test version

Signed-off-by: Florent Poinsard <[email protected]>

.github/workflows/upgrade_downgrade_test_query_serving_queries.yml

@@ -175,6 +175,12 @@ jobs:
         source build.env
         eatmydata -- go run test.go -skip-build -keep-data=false -docker=false -print-log -follow -tag upgrade_downgrade_query_serving_queries
 
+    - name: Check out commit's code
+      if: steps.skip-workflow.outputs.skip-workflow == 'false' && steps.changes.outputs.end_to_end == 'true'
+      uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+
     # Swap the binaries again. This time, vtgate will be at version n, and vttablet/vtctld will be at version n-1
     - name: Use current version VTGate, and other version VTTablet/VTctld
       if: steps.skip-workflow.outputs.skip-workflow == 'false' && steps.changes.outputs.end_to_end == 'true'