$ git clone -n https://src.fedoraproject.org/rpms/FP16.git /var/lib/mock/f40-build-2207973-52108/root/chroot_tmpdir/scmroot/FP16
Cloning into '/var/lib/mock/f40-build-2207973-52108/root/chroot_tmpdir/scmroot/FP16'...
$ git fetch origin f9cc6bb02748e8136a6c9e42675610576535d31c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/FP16
 * [new ref]         f9cc6bb02748e8136a6c9e42675610576535d31c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f9cc6bb Initial package