$ git clone -n https://src.fedoraproject.org/rpms/ghc-concatenative.git /var/lib/mock/f40-build-775988-128553/root/chroot_tmpdir/scmroot/ghc-concatenative
Cloning into '/var/lib/mock/f40-build-775988-128553/root/chroot_tmpdir/scmroot/ghc-concatenative'...
$ git fetch origin 877d12542dcdcf1b7b243a8d654696651abe488d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-concatenative
 * [new ref]         877d12542dcdcf1b7b243a8d654696651abe488d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 877d125 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild