$ git clone -n https://src.fedoraproject.org/rpms/xmlunit.git /var/lib/mock/f41-build-781139-13559/root/chroot_tmpdir/scmroot/xmlunit
Cloning into '/var/lib/mock/f41-build-781139-13559/root/chroot_tmpdir/scmroot/xmlunit'...
$ git fetch origin 792311768e73017fdd7c9a13686192d88b22c9ae:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xmlunit
 * [new ref]         792311768e73017fdd7c9a13686192d88b22c9ae -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7923117 Update to upstream version 2.9.1