def METHOD_NAME(rel_path, remote_url, commit_hash, start_line=None, end_line=None):
    """
    Open the URL corresponding to the provided `rel_path` on `remote_url`.
    """
    github_repo = parse_remote(remote_url)
    line_numbers = "#L{}-L{}".format(start_line, end_line) if start_line is not None else ""
    url = "{repo_url}/blob/{commit_hash}/{path}{lines}".format(
        repo_url=github_repo.url,
        commit_hash=commit_hash,
        path=rel_path,
        lines=line_numbers
    )
    open_in_browser(url)