Return ref tuple if ref is in the repo.

def _get_ref(repo, name):
    '''
    Return ref tuple if ref is in the repo.
    '''
    if name == 'base':
        name = repo['base']
    if name == repo['base'] or name in envs():
        if repo['branch_method'] == 'branches':
            return _get_branch(repo['repo'], name) \
                or _get_tag(repo['repo'], name)
        elif repo['branch_method'] == 'bookmarks':
            return _get_bookmark(repo['repo'], name) \
                or _get_tag(repo['repo'], name)
        elif repo['branch_method'] == 'mixed':
            return _get_branch(repo['repo'], name) \
                or _get_bookmark(repo['repo'], name) \
                or _get_tag(repo['repo'], name)
    return False