2018-05-30 11:16:47,895 [INFO] {376} koji.build.buildroot:440 Running mock as kojibuilder
INFO: mock.py version 1.4.10 starting (python version = 3.6.5)...
Start: init plugins
INFO: selinux disabled
Finish: init plugins
Start: run
ERROR: Namespace unshare failed.
ERROR: It seems we are running inside of Docker. Let skip unsharing.
ERROR: You should *not* run anything but Mock in this container. You have been warned!
Start: clean chroot
Finish: clean chroot
Start: chroot init
INFO: calling preinit hooks
INFO: enabled HW Info plugin
Mock Version: 1.4.10
INFO: Mock Version: 1.4.10
ERROR: Command failed: 
 # /bin/mount -n -t proc proc /var/lib/mock/f29-build-5939-1342/root/proc