$ git clone -n https://src.fedoraproject.org/rpms/AcetoneISO.git /var/lib/mock/f41-build-719009-13080/root/chroot_tmpdir/scmroot/AcetoneISO
Cloning into '/var/lib/mock/f41-build-719009-13080/root/chroot_tmpdir/scmroot/AcetoneISO'...
$ git fetch origin beb53154df13e96253250021c08c5a87ae7c4aef:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/AcetoneISO
 * [new ref]         beb53154df13e96253250021c08c5a87ae7c4aef -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at beb5315 Eliminate use of obsolete %patchN syntax (#2283636)