updating to master git command

Author: Kdisimone

docs/docs/walkthrough/phase-2/update-your-rig.md

@@ -2,13 +2,13 @@
 
 You've probably heard about all kinds of cool new features that you want to try. If they're part of the master branch already, you just need to go enable them (usually by [re-running the oref0-setup script](http://openaps.readthedocs.io/en/latest/docs/walkthrough/phase-2/oref0-setup.html#re-running-the-setup-script)).
 
-However, if it's a brand-new feature that's being tested or is recently added to master, you'll need to install the new version of `oref0` first.
+However, if it's a brand-new feature that's being tested or is recently added to master, you'll need to install the new version of `oref0` first.  By the way, if you want to check which branch of oref0 you are currently running, `cd src/oref0` and then `git branch`. 
 
 ## Step 1: Install the new version
 
 #### Recommended: To get the new stuff from the newest released master version of oref0
 
-1. `sudo npm install -g oref0`
+1. `cd ~/src/oref0 && git checkout master && sudo npm install -g oref0`
 
 #### Optional: To get on "dev" branch to test even more recently added new stuff