let channel_name = repo.config.get_current_channel(None);
        let channel = txn.load_channel(channel_name).unwrap();

        } else if let Some((_, (h, _))) = txn.reverse_log(&channel.borrow(), None).next() {
            h

            return Ok(());

            let channel_name = repo.config.get_current_channel(None);
            let channel = if let Some(channel) = txn.load_channel(channel_name) {
                channel
            } else {
                return Ok(());
            };
            let channel = channel.borrow();
            if let Some((_, (h, _))) = txn.reverse_log(&channel, None).next() {
                h
            } else {
                return Ok(());
            }