code: def get_commit_if_possible(filename):
      
      # git
      if opt.has_gitpython:
          from git import Repo, InvalidGitRepositoryError
          try:
              directory = os.path.dirname(filename)
              repo = Repo(directory, search_parent_directories=True)
              try:
                  path = repo.remote().url
              except ValueError:
                  path = 'git:/' + repo.working_dir
              is_dirty = repo.is_dirty()
              commit = repo.head.commit.hexsha
              return path, commit, is_dirty
          except (InvalidGitRepositoryError, ValueError):
              pass
      return None, None, None
docs: Try to retrieve VCS information for a given file.
  
      Currently only supports git using the gitpython package.
  
      Parameters
      ----------
      filename : str
  
      Returns
      -------
          path: str
              The base path of the repository
          commit: str
              The commit hash
          is_dirty: bool
              True if there are uncommitted changes in the repository