$ git clone -n https://src.fedoraproject.org/rpms/dtkwm.git /var/lib/mock/f41-build-side-1-2817290-32985/root/chroot_tmpdir/scmroot/dtkwm
Cloning into '/var/lib/mock/f41-build-side-1-2817290-32985/root/chroot_tmpdir/scmroot/dtkwm'...
$ git fetch origin b2079fc472da1a0594207c4404dfa22e29bb5e0f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dtkwm
 * [new ref]         b2079fc472da1a0594207c4404dfa22e29bb5e0f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b2079fc convert GPLv3 license to SPDX