Description of problem:
It's possible to set a channel sync latest packages only via the webui, but not through the command-line. I see there is an XMLRPC endpoint for channel.software.syncRepo which accepts a parameter map (which may include {"latest":true}, but currently spacecmd doesn't accept a "--latest" parameter or call the parameter-enabled endpoint so all sync schedules set via commandline are for the full content.

Version-Release number of selected component (if applicable):
Using 2.7, but code is the same through to master

Actual results:
Repo sync tasko jobs always download full repository content when scheduled via cli.

Expected results:
Option to specify "--latest" should be available via cli.

Additional info:
I'll see if I can put together a PR for this, just raising this ticket for the record and to link the github branch against.