$ git clone -n https://src.fedoraproject.org/rpms/warzone2100.git /var/lib/mock/f40-build-2216651-52503/root/chroot_tmpdir/scmroot/warzone2100
Cloning into '/var/lib/mock/f40-build-2216651-52503/root/chroot_tmpdir/scmroot/warzone2100'...
$ git fetch origin 149939e4d98d24cd91e65d5469971ad859ea1330:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/warzone2100
 * [new ref]         149939e4d98d24cd91e65d5469971ad859ea1330 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 149939e fix date