docs: def url(self):
          """
          Return a kojiweb URL for this resource.
  
          :returns: ``str``, kojiweb URL like
                    "http://cbs.centos.org/koji/buildinfo?buildID=21155"
          """
          endpoint = 'buildinfo?buildID=%d' % self.build_id
          return posixpath.join(self.connection.weburl, endpoint)