Peggy is just wrapper for virtue: https://github.com/jasonagnew/virtue2 - so you can just do:
ssh -t {user}@{ip} virtue app:deploy {app-name} {git-branch}
You can grab the {app-name} by sshing into the server and running ls /var/www
- it'd normally be:
{id}-{name}-{env}-{another-id}
For example:
11-get-suzie-live-2234754072
So on your local machine you can just run:
ssh -t root@getsuzie.com virtue app:deploy 11-get-suzie-live-2234754072 master