def get_keywords():
    """Get the keywords needed to look up the version information."""
    git_refnames = '%(DOLLAR)sFormat:%%d%(DOLLAR)s'
    git_full = '%(DOLLAR)sFormat:%%H%(DOLLAR)s'
    git_date = '%(DOLLAR)sFormat:%%ci%(DOLLAR)s'
    keywords = {'refnames': git_refnames, 'full': git_full, 'date': git_date}
    return keywords
