$ git clone -n https://src.fedoraproject.org/rpms/moby-engine.git /var/lib/mock/f41-build-842018-161431/root/chroot_tmpdir/scmroot/moby-engine
Cloning into '/var/lib/mock/f41-build-842018-161431/root/chroot_tmpdir/scmroot/moby-engine'...
$ git fetch origin 4e92ce38a7c8a3a52d5c10215c141b04226d00d8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/moby-engine
 * [new ref]         4e92ce38a7c8a3a52d5c10215c141b04226d00d8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4e92ce3 Handle s390x test failures