a tag in git via dulwich calls.

Args:
  repo: Path to repository
  tag: tag string
  author: tag author (optional, if annotated is set)
  message: tag message (optional)
  annotated: whether to create an annotated tag
  objectish: object the tag should point at, defaults to HEAD
  tag_time: Optional time for annotated tag
  tag_timezone: Optional timezone for annotated tag
  sign: GPG Sign the tag (bool, defaults to False,
    pass True to use default GPG key,
    pass a str containing Key ID to use a specific GPG key)
NrQ