opens multiple SSH connections

[foocp]

I have a local snapshot folder that contains 48 snapshots. Every hour a remote mirror machine connects to this local machine via btrfs-sync, but this opens a new consecutive SSH connection for each snapshot. Is this intended, or a result of a misconfiguration on my part?

Here's my bash script, which lives in /etc/cron.hourly on the mirror machine

#!/bin/bash
/usr/local/bin/btrfs-sync -v -user@host.tld:/media/SSD1/ncp-snapshots /media/SSD/ncp-snapshots >>/home/mirror/cron_btrfs-sync.out 2>&1