Is git up a valid command?

Question

Is there a command called git up. I have seen a few other posts where it is used. I am using git version 1.7.9.5 and I get following error when trying to use the command :

git: 'up' is not a git command. See 'git --help'.

Is there something I am missing here?

Answer 1

Those posts may be referring to this tool, whose source code is available here.