$ git clone -n https://src.fedoraproject.org/rpms/ghc-simple-cabal.git /var/lib/mock/f45-build-10766-424/root/chroot_tmpdir/scmroot/ghc-simple-cabal
Cloning into '/var/lib/mock/f45-build-10766-424/root/chroot_tmpdir/scmroot/ghc-simple-cabal'...
$ git fetch origin c64cf484b323dc75c7bd7ff14b93b60356e903e3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-simple-cabal
 * [new ref]         c64cf484b323dc75c7bd7ff14b93b60356e903e3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c64cf48 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild