$ git clone -n https://src.fedoraproject.org/rpms/libfilezilla.git /var/lib/mock/f39-build-1540147-36468/root/chroot_tmpdir/scmroot/libfilezilla
Cloning into '/var/lib/mock/f39-build-1540147-36468/root/chroot_tmpdir/scmroot/libfilezilla'...
$ git fetch origin df3b937df95f0167ce5a9eb115145c506b585eb7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libfilezilla
 * [new ref]         df3b937df95f0167ce5a9eb115145c506b585eb7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at df3b937 0.45.0