I just tried using rhpkg mock-config but it failed.

{{{
[twaugh@worm cups (rhel-5.8)]$ rhpkg mock-config
Could not generate the mock config: 'NoneType' object is not subscriptable
}}}

strace reveals the xmlrpc query and response:

{{{
sendto(3, "POST /xxxxxxx HTTP/1.1\r\nHost: xxxxxxx.redhat.com\r\nAccept-Encoding: gzip\r\nUser-Agent: xmlrpclib.py/1.0.1 (by www.pythonware.com)\r\nContent-Type: text/xml\r\nContent-Length: 149\r\n\r\n<?xml version='1.0'?>\n<methodCall>\n<methodName>getRepo</methodName>\n<params>\n<param>\n<value><int>1117</int></value>\n</param>\n</params>\n</methodCall>\n", 3xx, 0, NULL, 0) = 3xx
recvfrom(3, "HTTP/1.1 200 OK\r\nDate: Tue, 24 Jan 2012 16:50:25 GMT\r\nServer: Apache\r\nContent-Length: 114\r\nConnection: close\r\nContent-Type: text/xml\r\n\r\n<?xml version='1.0'?>\n<methodResponse>\n<params>\n<param>\n<value><nil/></value></param>\n</params>\n</methodResponse>\n", 8192, 0, NULL, NULL) = 250
}}}

Using rhpkg-1.6-1.fc16.noarch.