$ git clone -n https://src.fedoraproject.org/rpms/jsonnet.git /var/lib/mock/f41-build-1185254-22040/root/chroot_tmpdir/scmroot/jsonnet
Cloning into '/var/lib/mock/f41-build-1185254-22040/root/chroot_tmpdir/scmroot/jsonnet'...
$ git fetch origin d01545972acaa2f95f67f19ccb927d0ca3013e2f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jsonnet
 * [new ref]         d01545972acaa2f95f67f19ccb927d0ca3013e2f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d015459 Fix declarations