Traceback (most recent call last):
File "/usr/sbin/koji-gc", line 910, in <module>
options, args = get_options()
File "/usr/sbin/koji-gc", line 114, in get_options
config = koji.read_config_files(cf)
File "/usr/lib/python2.7/site-packages/koji/__init__.py", line 1885, in read_config_files
raise GenericError('invalid type: %s' % type(config_files))
koji.GenericError: invalid type: <type 'NoneType'>