The ppc64le builders seem to run out of disk space when building mingw-wxWidgets3: https://copr-be.cloud.fedoraproject.org/results/sailer/mingw/fedora-25-ppc64le/00505840-mingw-wxWidgets3/root.log.gz
*** Bug 1421227 has been marked as a duplicate of this bug. ***
Should be now fixed. Please, can you rerun the build and confirm?
I can't speak for mingw-wxWidgets3, but my kernel builds are now working: * https://copr.fedorainfracloud.org/coprs/pcmoore/kernel-secnext/build/513594
Works now for me, thanks!