$ git clone -n https://src.fedoraproject.org/rpms/toolbox.git /var/lib/mock/f41-build-859109-168551/root/chroot_tmpdir/scmroot/toolbox
Cloning into '/var/lib/mock/f41-build-859109-168551/root/chroot_tmpdir/scmroot/toolbox'...
$ git fetch origin 2a7e0f301d9c6b4ed0e206aef7e2288c0ad28384:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/toolbox
 * [new ref]         2a7e0f301d9c6b4ed0e206aef7e2288c0ad28384 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2a7e0f3 Update to 0.1.0