$ git clone -n https://src.fedoraproject.org/rpms/ghc-json.git /var/lib/mock/f40-build-776328-128763/root/chroot_tmpdir/scmroot/ghc-json
Cloning into '/var/lib/mock/f40-build-776328-128763/root/chroot_tmpdir/scmroot/ghc-json'...
$ git fetch origin 905c8d0e3f5380154953af04a3d084e91d67bb1f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-json
 * [new ref]         905c8d0e3f5380154953af04a3d084e91d67bb1f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 905c8d0 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild