FYI: mock-1.2.1 is out and heading to stable Fedoras and RHELs.

http://miroslav.suchy.cz/blog/archives/2014/11/17/mock_1_2_1/index.html

If you have your scripts build on top of mock, please test it with --new-chroot as it may become default in near future and there is chance that it can break your scripts.

Miroslav Suchy