If you encountered the following log record in builder-live.log on ppc64le:

Running: unbuffer /usr/bin/mock --buildsrpm --spec /tmp/tmp75ah4ork/gawk.spec --sources /tmp/tmp75ah4ork --configdir /var/lib/copr-rpmbuild/results/configs --resultdir /var/lib/copr-rpmbuild/results --define %_disable_source_fetch 0 --uniqueext 1515449007.724298 -r child
WARNING: Could not find required logging config file: /var/lib/copr-rpmbuild/results/configs/logging.ini. Using default...
ERROR: Could not find log config file /etc/mock/logging.ini

It was because misconfiguration in new ppc64le images that were just deployed in production. 

The problem in base image is now fixed.

New x86_64 images were deployed as well. Both archs are now using the latest mock 1.4.8.

We are very sorry for the problem.

COPR Team