$ git clone -n https://src.fedoraproject.org/rpms/python-json-specifications.git /var/lib/mock/f40-build-2542518-61879/root/chroot_tmpdir/scmroot/python-json-specifications
Cloning into '/var/lib/mock/f40-build-2542518-61879/root/chroot_tmpdir/scmroot/python-json-specifications'...
$ git fetch origin d563372110952fa6698a9aa28a057ce2a3d9cc8f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-json-specifications
 * [new ref]         d563372110952fa6698a9aa28a057ce2a3d9cc8f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d563372 Added the README