How I can make more than one snapshot when in sahara sandbox mode? Or, can I see list of all commits I've ever made and rollback to any?

Why do I need all this?

I just want to setup initial VM. After that I want to compile number of packages from sources, and this takes pretty long time. So right now I thinking of this order:

1. Setup initial ubuntu 12.04 vagrant box
2. Snapshot this state
3. Compile sources, install system wide rbenv (it make compilation also)
4. Snapshot second state
5. Start all my infrastructure experiments
6. Rollback to any of my previous states or commit third state