$ git clone -n https://src.fedoraproject.org/rpms/udftools.git /var/lib/mock/f41-build-side-1-2671030-29078/root/chroot_tmpdir/scmroot/udftools
Cloning into '/var/lib/mock/f41-build-side-1-2671030-29078/root/chroot_tmpdir/scmroot/udftools'...
$ git fetch origin d3a38fc825c5fbb579d64b54446c1147e03a417a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/udftools
 * [new ref]         d3a38fc825c5fbb579d64b54446c1147e03a417a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d3a38fc convert GPLv2+ license to SPDX