$ git clone -n https://src.fedoraproject.org/rpms/ghc-cached-json-file.git /var/lib/mock/f40-build-2687754-68096/root/chroot_tmpdir/scmroot/ghc-cached-json-file
Cloning into '/var/lib/mock/f40-build-2687754-68096/root/chroot_tmpdir/scmroot/ghc-cached-json-file'...
$ git fetch origin ffcc979d1873270906831c4e7c1907bbb83c41eb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-cached-json-file
 * [new ref]         ffcc979d1873270906831c4e7c1907bbb83c41eb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ffcc979 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild