code: def get_files_changed(repository, review_id):
      
      repository.git.fetch([next(iter(repository.remotes)), review_id])
      files_changed = repository.git.diff_tree(["--no-commit-id",
                                                "--name-only",
                                                "-r",
                                                "FETCH_HEAD"]).splitlines()
      print("Found {} files changed".format(len(files_changed)))
      return files_changed
docs: Get a list of files changed compared to the given review.
      Compares against current directory.
  
      :param repository: Git repository. Used to get remote.
        - By default uses first remote in list.
      :param review_id: Gerrit review ID.
      :return: List of file paths relative to current directory.