$ git clone -n https://src.fedoraproject.org/rpms/python-jsondiff.git /var/lib/mock/f45-build-31218-651/root/chroot_tmpdir/scmroot/python-jsondiff
Cloning into '/var/lib/mock/f45-build-31218-651/root/chroot_tmpdir/scmroot/python-jsondiff'...
$ git fetch origin 16b8b5e233d77dfebaece1644b198204baf8f400:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-jsondiff
 * [new ref]         16b8b5e233d77dfebaece1644b198204baf8f400 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 16b8b5e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild