With the Github Salesforce deploy tool a button can be added to Github "README" files for deploying it via browser using your repository. Previously it is working only on the master branch but now it can be done on other branches too.
If on the "README" file button is present it will automatically detect the branch.
All you need to do is reach the main page and just use the button code and paste it into your "README" file. A reference param will be added to the generated URL.