$ git clone -n https://src.fedoraproject.org/rpms/ghc-cassava.git /var/lib/mock/f40-build-777011-129169/root/chroot_tmpdir/scmroot/ghc-cassava
Cloning into '/var/lib/mock/f40-build-777011-129169/root/chroot_tmpdir/scmroot/ghc-cassava'...
$ git fetch origin c1ad7d577c5e7cc7692f41ffb56ce450578efe4e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-cassava
 * [new ref]         c1ad7d577c5e7cc7692f41ffb56ce450578efe4e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c1ad7d5 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild