$ git clone -n https://src.fedoraproject.org/rpms/ghc-boxes.git /var/lib/mock/f45-build-10053-412/root/chroot_tmpdir/scmroot/ghc-boxes
Cloning into '/var/lib/mock/f45-build-10053-412/root/chroot_tmpdir/scmroot/ghc-boxes'...
$ git fetch origin 00bd455244862dbad58bd06515fadba0244a34a0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-boxes
 * [new ref]         00bd455244862dbad58bd06515fadba0244a34a0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 00bd455 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild