def METHOD_NAME(branch_name: str, access_token: str):
    """
    Update an existing PR.
    """
    pr_number = get_pr_number()
    create_commit(commit_message(branch_name))
    push(branch_name)
    add_comment_to_pr(
        pr_number,
        long_description(branch_name),
        access_token,
    )
    logging.info("PR updated: %s", pr_number)