$ git clone -n https://src.fedoraproject.org/rpms/kubrick.git /var/lib/mock/f42-build-880909-183013/root/chroot_tmpdir/scmroot/kubrick
Cloning into '/var/lib/mock/f42-build-880909-183013/root/chroot_tmpdir/scmroot/kubrick'...
$ git fetch origin 3be216b946ce2ab0841f544a44128b4b1ac4218b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kubrick
 * [new ref]         3be216b946ce2ab0841f544a44128b4b1ac4218b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3be216b Rebuild for ppc64le enablement