$ git clone -n https://src.fedoraproject.org/rpms/OpenIPMI.git /var/lib/mock/f40-build-793086-138784/root/chroot_tmpdir/scmroot/OpenIPMI
Cloning into '/var/lib/mock/f40-build-793086-138784/root/chroot_tmpdir/scmroot/OpenIPMI'...
$ git fetch origin d6d15f112717645a2af45657bd0cf5ca83764afb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/OpenIPMI
 * [new ref]         d6d15f112717645a2af45657bd0cf5ca83764afb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d6d15f1 Update %changelog