$ git clone -n https://src.fedoraproject.org/rpms/rpm-mpi-hooks.git /var/lib/mock/f45-build-34658-690/root/chroot_tmpdir/scmroot/rpm-mpi-hooks
Cloning into '/var/lib/mock/f45-build-34658-690/root/chroot_tmpdir/scmroot/rpm-mpi-hooks'...
$ git fetch origin 6834ee61c40b302a6ef55e9ab931d20208075abb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rpm-mpi-hooks
 * [new ref]         6834ee61c40b302a6ef55e9ab931d20208075abb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6834ee6 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild