$ git clone -n https://src.fedoraproject.org/rpms/mcrouter.git /var/lib/mock/f42-build-3350076-45010/root/chroot_tmpdir/scmroot/mcrouter
Cloning into '/var/lib/mock/f42-build-3350076-45010/root/chroot_tmpdir/scmroot/mcrouter'...
$ git fetch origin 7aece7f9d2b13d3f174ed1a7c7cf69204c8bebf7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mcrouter
 * [new ref]         7aece7f9d2b13d3f174ed1a7c7cf69204c8bebf7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7aece7f Temporarily disable ppc64le build