$ git clone -n https://src.fedoraproject.org/rpms/rejson.git /var/lib/mock/f41-build-side-1-3135922-39768/root/chroot_tmpdir/scmroot/rejson
Cloning into '/var/lib/mock/f41-build-side-1-3135922-39768/root/chroot_tmpdir/scmroot/rejson'...
$ git fetch origin 81a81fb5dab6361b9d981330f57706b114a02694:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rejson
 * [new ref]         81a81fb5dab6361b9d981330f57706b114a02694 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 81a81fb Rebuilt for https://fedoraproject.org/wiki/Fedora_41_Mass_Rebuild