Detect remote url when in project

[Boomatang]

There is times when I wnat to add a remote to the local repos.
It happens that I assumed the remote existed and only find out when trying to push to the remote that it is missing.

I would expect the usage to look something like.

grab -r Boomatang

Not sure if a different flag should also be passed to make the parse easier.
So something like

garb -ro Boomatang

maybe better where o stands for org/user.