[chef] Branches as an alternative to environments?

[Michael Hale < >]

Has anyone thought about using git branches as an alternative to environments?

* Branches already provide a nice mechanism for associating a
particular set of cookbook/role/data_bag versions together as a named
thing.
* git push chef-server master (ala heroku deploy) besides being really
cool, could be really fast as well.
* Using a branch keeps me from having to maintain cookbook version
numbers manually.

Thoughts?