Installing GitHub for Windows is a nice way to get at once beginner's git Windows app, msysgit and posh-git - but you can only start the git shell with posh-git by calling "GitHub.appref-ms --open-shell".
What I want to do, is to start a console, load powershell, and use posh-git that comes with Github for Windows - but I can't figure a way to load it into the powershell.
Update: I do not want to install Git for Windows separately, since msysgit is already installed.
I was able to make some progress by calling the shell1.ps1 script from AppData\Local\Github folder - and it does let me invoke git. But it does not display the branch I'm in, opposite to the "Git Shell" from GitHub for Windows.