$ git clone -n https://src.fedoraproject.org/rpms/crun-vm.git /var/lib/mock/f41-build-side-1-2903323-34687/root/chroot_tmpdir/scmroot/crun-vm
Cloning into '/var/lib/mock/f41-build-side-1-2903323-34687/root/chroot_tmpdir/scmroot/crun-vm'...
$ git fetch origin b0b558fe4a99bf8823f8c758fff44074058efba9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/crun-vm
 * [new ref]         b0b558fe4a99bf8823f8c758fff44074058efba9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b0b558f Update to 0.3.0