$ git clone -n https://src.fedoraproject.org/rpms/ghc-old-time.git /var/lib/mock/f45-build-10606-419/root/chroot_tmpdir/scmroot/ghc-old-time
Cloning into '/var/lib/mock/f45-build-10606-419/root/chroot_tmpdir/scmroot/ghc-old-time'...
$ git fetch origin 32ffa05905b8060893f5804750da0b4d2a52f1e6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-old-time
 * [new ref]         32ffa05905b8060893f5804750da0b4d2a52f1e6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 32ffa05 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild