$ git clone -n https://src.fedoraproject.org/rpms/reposurgeon.git /var/lib/mock/f41-build-757252-13423/root/chroot_tmpdir/scmroot/reposurgeon
Cloning into '/var/lib/mock/f41-build-757252-13423/root/chroot_tmpdir/scmroot/reposurgeon'...
$ git fetch origin e1ea12fea194168cc1f6122663a29ba39dfbc18c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/reposurgeon
 * [new ref]         e1ea12fea194168cc1f6122663a29ba39dfbc18c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e1ea12f reposurgeon: 5.0 release