$ git clone -n https://src.fedoraproject.org/rpms/jflex.git /var/lib/mock/f41-build-1633169-24124/root/chroot_tmpdir/scmroot/jflex
Cloning into '/var/lib/mock/f41-build-1633169-24124/root/chroot_tmpdir/scmroot/jflex'...
$ git fetch origin a2df78924cb3514f9d4ff362506875a47bd18512:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jflex
 * [new ref]         a2df78924cb3514f9d4ff362506875a47bd18512 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a2df789 Extract smoke tests out of test plan