$ git clone -n https://src.fedoraproject.org/rpms/tunneler.git /var/lib/mock/f41-build-855289-167102/root/chroot_tmpdir/scmroot/tunneler
Cloning into '/var/lib/mock/f41-build-855289-167102/root/chroot_tmpdir/scmroot/tunneler'...
$ git fetch origin ce3563c0c9b574d8470094a90c12e5b7d68b1fef:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tunneler
 * [new ref]         ce3563c0c9b574d8470094a90c12e5b7d68b1fef -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ce3563c Fix building with -D_FORTIFY_SOURCE=3