$ git clone -n https://src.fedoraproject.org/rpms/toolbox.git /var/lib/mock/f41-build-side-1-2844574-33876/root/chroot_tmpdir/scmroot/toolbox
Cloning into '/var/lib/mock/f41-build-side-1-2844574-33876/root/chroot_tmpdir/scmroot/toolbox'...
$ git fetch origin 201afeb2534dad57448efcd993b3fd8d73243440:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/toolbox
 * [new ref]         201afeb2534dad57448efcd993b3fd8d73243440 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 201afeb Update to 0.0.99.6