$ git clone -n https://src.fedoraproject.org/rpms/ghc-date-cache.git /var/lib/mock/f40-build-776000-128553/root/chroot_tmpdir/scmroot/ghc-date-cache
Cloning into '/var/lib/mock/f40-build-776000-128553/root/chroot_tmpdir/scmroot/ghc-date-cache'...
$ git fetch origin b6674c60a0df797d1d16cecdbde96c262eec38e9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-date-cache
 * [new ref]         b6674c60a0df797d1d16cecdbde96c262eec38e9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b6674c6 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild