$ git clone -n https://src.fedoraproject.org/rpms/ghc-persistent-template.git /var/lib/mock/f45-build-10611-419/root/chroot_tmpdir/scmroot/ghc-persistent-template
Cloning into '/var/lib/mock/f45-build-10611-419/root/chroot_tmpdir/scmroot/ghc-persistent-template'...
$ git fetch origin b2f8749a1a65eb697ebbaa92655463197bcff68e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-persistent-template
 * [new ref]         b2f8749a1a65eb697ebbaa92655463197bcff68e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b2f8749 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild