Add a setting that would try "origin master" if there's no tracking information

[d33tah]

$ git up
Can't update your repo because it doesn't has any branches with tracking information.

I would love to be able to set something like GIT_UP_TRY_ORIGINMASTER that would try pulling from origin/master in this case.

[msiemens]

Why don't you set up the tracking information for your repo? I'm not sure this is a common case...

[d33tah]

This happens to me when I run git init and then add remotes, use hub create and other tools that create a .git directory without actually using git clone.