$ git clone -n https://src.fedoraproject.org/rpms/spicctrl.git /var/lib/mock/f41-build-side-1-2968091-35816/root/chroot_tmpdir/scmroot/spicctrl
Cloning into '/var/lib/mock/f41-build-side-1-2968091-35816/root/chroot_tmpdir/scmroot/spicctrl'...
$ git fetch origin b3da436e924b0fac95cca3b2e9778d21311a915d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/spicctrl
 * [new ref]         b3da436e924b0fac95cca3b2e9778d21311a915d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b3da436 convert GPLv2+ license to SPDX