Make sure we're targeting the right branch in the

canonical project. Forks might not be sharing with the same
$CI_DEFAULT_BRANCH with the canonical project.

scripts/rspec_helpers.sh

@@ -3,11 +3,14 @@
 function retrieve_tests_metadata() {
   mkdir -p knapsack/ rspec_flaky/ rspec_profiling/
 
+  # ${CI_DEFAULT_BRANCH} might not be master in other forks but we want to
+  # always target the canonical project here, so the branch must be hardcoded
   local project_path="gitlab-org/gitlab"
+  local artifact_branch="master"
   local test_metadata_job_id
 
   # Ruby
-  test_metadata_job_id=$(scripts/api/get_job_id.rb --project "${project_path}" -q "status=success" -q "ref=${CI_DEFAULT_BRANCH}" -q "username=gitlab-bot" -Q "scope=success" --job-name "update-tests-metadata")
+  test_metadata_job_id=$(scripts/api/get_job_id.rb --project "${project_path}" -q "status=success" -q "ref=${artifact_branch}" -q "username=gitlab-bot" -Q "scope=success" --job-name "update-tests-metadata")
 
   if [[ ! -f "${KNAPSACK_RSPEC_SUITE_REPORT_PATH}" ]]; then
     scripts/api/download_job_artifact.rb --project "${project_path}" --job-id "${test_metadata_job_id}" --artifact-path "${KNAPSACK_RSPEC_SUITE_REPORT_PATH}" || echo "{}" > "${KNAPSACK_RSPEC_SUITE_REPORT_PATH}"