README.md in appbundle-updater-0.1.0 vs README.md in appbundle-updater-0.2.0

@@ -52,9 +52,30 @@
 & appbundle-updater chefdk test-kitchen master
 ```
 
 If you don't want "master" you can use any other git tag/branch/sha/etc that git understands.
 
+## Using a GitHub Fork
+
+By default this gem clones from the official repos from the software. To override and point
+at at fork use the `--github`` option on the command-line:
+
+```ruby
+sudo appbundle-updater chef chef lcg/cool-feature --github lamont-granquist/chef
+```
+
+## Using a GitHub tarball instead of a git clone
+
+Using the `--tarball` method will not use `git clone` and will not require the git binary being
+installed on the system.  By using this command the whole functionality should run in pure ruby,
+be portable across all operating systems that omnibus-chef is ported to, and should only use
+ruby stdlib functions.  The disadvantage is that you do now wind up with a real git checkout
+in the apps directory, just an extracted snapshot.
+
+```ruby
+sudo appbundle-updater chef chef master --tarball
+```
+
 ## Execution and Target rubies
 
 This does not need to be installed into the embedded ruby that you are doing the update on.
 
 You can install this into an rvm gemset as a local user (for example) and run: