$ git clone -n https://src.fedoraproject.org/rpms/rejson.git /var/lib/mock/f39-build-1489860-34502/root/chroot_tmpdir/scmroot/rejson
Cloning into '/var/lib/mock/f39-build-1489860-34502/root/chroot_tmpdir/scmroot/rejson'...
$ git fetch origin 4791f49d7242c58499c82745a5d90bc1042a294f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rejson
 * [new ref]         4791f49d7242c58499c82745a5d90bc1042a294f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4791f49 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild