The ppc64le architecture has an older version of selinux-policy than aarch64 or x86_64 do.

This should be fixed in the next hour or so.

It's still a problem... https://koji.fedoraproject.org/koji/taskinfo?taskID=34678353

Still happening today: https://koji.fedoraproject.org/koji/taskinfo?taskID=34699346

Fixed.

:carousel_horse:

Fix does not seem to have taken or similar problem occurring:

https://koji.fedoraproject.org/koji/buildinfo?buildID=1265325

failed because
'''
DEBUG util.py:677: Executing command: ['/usr/bin/yum-deprecated', '--installroot', '/var/lib/mock/epel7-build-16180913-1158360/root/', 'groupinstall', 'build', '--setopt=tsflags=nocontexts'] with env {'TERM': 'vt100', 'SHELL': '/bin/bash', 'HOME': '/builddir', 'HOSTNAME': 'mock', 'PATH': '/usr/bin:/bin:/usr/sbin:/sbin', 'PROMPT_COMMAND': 'printf "\033]0;<mock-chroot>\007"', 'PS1': '<mock-chroot> \s-\v\$ ', 'LANG': 'C.UTF-8', 'LC_MESSAGES': 'C.UTF-8', 'LD_PRELOAD': '/var/tmp/tmp.mock.2joymrie/$LIB/nosync.so'} and shell False
DEBUG util.py:583: BUILDSTDERR: Yum command has been deprecated, use dnf instead.
DEBUG util.py:583: BUILDSTDERR: See 'man dnf' and 'man yum2dnf' for more information.
DEBUG util.py:583: BUILDSTDERR: There is no installed groups file.
DEBUG util.py:583: BUILDSTDERR: Maybe run: yum groups mark convert (see man yum)
DEBUG util.py:583: BUILDSTDERR: Error: Package: perl-Getopt-Long-2.40-3.el7.noarch (build)
DEBUG util.py:583: BUILDSTDERR: Requires: perl(Text::ParseWords)
DEBUG util.py:583: BUILDSTDERR: Error: Package: gcc-c++-4.8.5-36.el7_6.2.ppc64 (build)
DEBUG util.py:583: BUILDSTDERR: Requires: libmpfr.so.4()(64bit)
....

'''

other arches seemed to have worked.

Sry, double post. See previous comment.

Please note that this is a problem with a different architecture: ppc64 != ppc64le.
This seems to be Koji not using the external repo.

Okay, so this was caused by another case of moved packages with different contents. I'm now resyncing all the ppc64 content from scratch after which this'll hopefully be resolved.
This'll take an hour or so approximately.

This should now be fixed
And the ppc64 build of https://koji.fedoraproject.org/koji/taskinfo?taskID=34722891 passed (@besser82).

Thank you @puiterwijk