$ git clone -n https://src.fedoraproject.org/rpms/ghc-mmorph.git /var/lib/mock/f40-build-776392-128831/root/chroot_tmpdir/scmroot/ghc-mmorph
Cloning into '/var/lib/mock/f40-build-776392-128831/root/chroot_tmpdir/scmroot/ghc-mmorph'...
$ git fetch origin 2296b67829a5691e839ce986e5de3cbbc1b7f9ed:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-mmorph
 * [new ref]         2296b67829a5691e839ce986e5de3cbbc1b7f9ed -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2296b67 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild