code: def test_infer_versioning_metadata_on_detached_head(repo):
      """Test in the case of a detached head."""
      with open("README.md", "w+") as f:
          f.write("dummy contentt")
      repo.git.add("README.md")
      repo.index.commit("2nd commit")
      existing_metadata = {}
      existing_metadata["user_script"] = ".git"
      repo.head.reference = repo.commit("HEAD~1")
      assert repo.head.is_detached
      vcs = resolve_config.infer_versioning_metadata(".git")
      assert vcs["active_branch"] is None
  
imports: import hashlib
  import logging
  import os
  import shutil
  import git
  import pytest
  import orion.core
  import orion.core.io.resolve_config
label_desc: Use image node_id 42 for calling a global function with example usage: test_infer_versioning_metadata_on_detached_head(repo) without return types