Although most of the people may consider it obvious, I'd like to see the description of the config_opts['yum.conf'] option somewhere in an official documentation. So far, if my program uses Mock, the only thing I can tell about one of its options is that it sets the value of "config_opts['yum.conf']". This is not very user-friendly.
*** This bug has been marked as a duplicate of bug 1228751 ***