$ git clone -n https://src.fedoraproject.org/rpms/python-orjson.git /var/lib/mock/f39-build-1759988-41494/root/chroot_tmpdir/scmroot/python-orjson
Cloning into '/var/lib/mock/f39-build-1759988-41494/root/chroot_tmpdir/scmroot/python-orjson'...
$ git fetch origin a1d33d86fd031f48025730cf7e18e8832541f548:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-orjson
 * [new ref]         a1d33d86fd031f48025730cf7e18e8832541f548 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a1d33d8 Update to 3.9.10. Fixes rhbz#2243767.