$ git clone -n https://src.fedoraproject.org/rpms/warzone2100.git /var/lib/mock/f41-build-855799-167429/root/chroot_tmpdir/scmroot/warzone2100
Cloning into '/var/lib/mock/f41-build-855799-167429/root/chroot_tmpdir/scmroot/warzone2100'...
$ git fetch origin 6a4730d41dd2608d39ec5b67405aa917defd92bc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/warzone2100
 * [new ref]         6a4730d41dd2608d39ec5b67405aa917defd92bc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6a4730d Update to 4.5.3 (rhbz#2312053)