Return a kojiweb URL for this resource.

        :returns: ``str``, kojiweb URL like
                  "http://cbs.centos.org/koji/buildinfo?buildID=21155"

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)