If your not familiar, the GitHub Salesforce Deploy Tool will allow you to place a handy button on your GitHub README files to allow for super easy browser based deployment from your repo to a Salesforce org. Up until now it only worked on the master branch, it now supports branches!
The new support for branches, does in fact cover tags and commits as well. Though only branches are defaulted from the button. If you already have the button on your README file, you will find it now magically starts detecting the branch!
If your new to the tool, go to the main page and grab the button code and paste it into your README file. Or if you want a button you can use explicitly in a blog or article you can fill in the fields and generate it from the same page. As you can see the enhancement adds a new ref parameter to the generated URL. This can be a branch name, tag or commit. You can read more about the tool here.