Following this guide:
Add yourself to the mock group:
# usermod -a -G mock yourusername
usermod group 'mock' does not exist
$ sudo yum install mock
$ sudo useradd -s /sbin/nologin mockbuild
I'm closing this bug as part of a Bugzilla cleanup effort. The most likely reason is that the bug has been opened either against a component we no longer publish, or against Release Notes for an EOL release.