$ git clone -n https://src.fedoraproject.org/rpms/ghc-persistent.git /var/lib/mock/f45-build-52227-908/root/chroot_tmpdir/scmroot/ghc-persistent
Cloning into '/var/lib/mock/f45-build-52227-908/root/chroot_tmpdir/scmroot/ghc-persistent'...
$ git fetch origin 20cc18889baa6a4a3556c9c0f836fc42d542f3f7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-persistent
 * [new ref]         20cc18889baa6a4a3556c9c0f836fc42d542f3f7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 20cc188 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild