$ git clone -n https://src.fedoraproject.org/rpms/ghc-simple-cabal.git /var/lib/mock/f40-build-776162-128641/root/chroot_tmpdir/scmroot/ghc-simple-cabal
Cloning into '/var/lib/mock/f40-build-776162-128641/root/chroot_tmpdir/scmroot/ghc-simple-cabal'...
$ git fetch origin ff748e549377dd0c53298fde27a4a12b6c7f137a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-simple-cabal
 * [new ref]         ff748e549377dd0c53298fde27a4a12b6c7f137a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ff748e5 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild