$ git clone -n https://src.fedoraproject.org/rpms/kcalutils.git /var/lib/mock/f42-build-side-1-3501703-45976/root/chroot_tmpdir/scmroot/kcalutils
Cloning into '/var/lib/mock/f42-build-side-1-3501703-45976/root/chroot_tmpdir/scmroot/kcalutils'...
$ git fetch origin 147ba68416443cc87bb40e145ddb71d027f630da:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kcalutils
 * [new ref]         147ba68416443cc87bb40e145ddb71d027f630da -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 147ba68 25.04.0