Something

ERROR: Error performing yum command: /usr/bin/yum --installroot /var/lib/mock/epel-5-x86_64/root install buildsys-build
Traceback (most recent call last):
  File "/usr/lib/python2.5/site-packages/mock/backend.py", line 442, in _yum
    output = mock.util.do(cmd, returnOutput=returnOutput)
  File "<string>", line 1, in <lambda>
  File "/usr/lib/python2.5/site-packages/mock/trace_decorator.py", line 24, in trace
    result = f(*args, **kw)
  File "/usr/lib/python2.5/site-packages/mock/util.py", line 244, in do
    raise mock.exception.Error, "Command(%s) failed. See logs for output." % command
Error: Command(/usr/bin/yum --installroot /var/lib/mock/epel-5-x86_64/root install buildsys-build) failed. See logs for output.
ERROR: Exception(bazaar-webserve-0.12-0.1.20071205bzr249.fc8.src.rpm) Config(epel-5-x86_64) 9 minutes 30 seconds
INFO: Results and/or logs in: /var/lib/mock/epel-5-x86_64/result
ERROR: Error performing yum command: /usr/bin/yum --installroot /var/lib/mock/epel-5-x86_64/root install buildsys-build