Setup tracking for default branch when cloned.

[jmalloc]

Is it possible to set up tracking of remote branches, similarly to how git clone does for the default branch? I've found the relevant configuration mentioned here, but I think that's just testing that configuration is marshalled and unmarshalled without losing information.

It this is not possible currently, what would be the most appropriate way to implement this? Should Config gain methods for manipulating these particular settings, should Clone / PlainClone do this by default, etc, etc.

Any guidance would be much appreciated :)

[mcuadros]

@jmalloc the first step is update the Config struct to handle the branch section, after that you need to modify the behavior Clone or any other related method, to mimic the git behavior.

[orirawlings]

Related to #600

[TheHipbot]

@mcuadros Happy to pick this up if its not in progress already.