message: [script] shallow initialize submodules
diff: @@ -135,7 +135,7 @@ main()
  {
  . $BEFORE_HOOK
  # TODO remove `|| true` after docker hub builder gets its git upgraded
  - git submodule update --init --recursive || true
  + git submodule update --init --recursive --depth 1 || true
  install_packages
  . $AFTER_HOOK
  }
  