How to install GitFlow for Windows
If you have Sourcetree OR if you install Sourcetree, you can find GitFlow options there. This is one of the easiest way to use GitFlow.
Once you active GitFlow from their (shown in the above screenshot), you can use all GitFlow commands from the terminal as well.
Use the recently released Git for Windows 2.5.3 which now ships with git-flow
(the AVH edition of it).