$ git clone -n https://src.fedoraproject.org/rpms/json-glib.git /var/lib/mock/f40-build-787476-134779/root/chroot_tmpdir/scmroot/json-glib
Cloning into '/var/lib/mock/f40-build-787476-134779/root/chroot_tmpdir/scmroot/json-glib'...
$ git fetch origin 43a0a0d9152d4abd6ad7d63df43ae50cabb61a6d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/json-glib
 * [new ref]         43a0a0d9152d4abd6ad7d63df43ae50cabb61a6d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 43a0a0d Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild