$ git clone -n https://src.fedoraproject.org/rpms/filezilla.git /var/lib/mock/f40-build-1817419-24911/root/chroot_tmpdir/scmroot/filezilla
Cloning into '/var/lib/mock/f40-build-1817419-24911/root/chroot_tmpdir/scmroot/filezilla'...
$ git fetch origin 38feccaa1760e869b51a14c4af9934c1b8ec7c1c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/filezilla
 * [new ref]         38feccaa1760e869b51a14c4af9934c1b8ec7c1c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 38fecca 3.67.1 final