def METHOD_NAME(kdir, commit, base_url):
    subject = _git_show_fmt(kdir, commit, '%s')
    dom = _lore_atom_query(subject, base_url)
    entries = _lore_get_entries(dom)
    if not entries:
        return None
    lore_url = _lore_url_match(entries, subject)
    if not lore_url:
        return None
    return _lore_mbox(lore_url)