infra/config/recipes.cfg

{
  "api_version": 2,
  "deps": {
    "recipe_engine": {
      "branch": "master",
      "revision": "4d872b88fb06006ec917c6d2a3324e26c0124319",
      "url": "https://chromium.googlesource.com/infra/luci/recipes-py"
    }
  },
  "project_id": "infra"
}