What is git-flow-avh Package ?

git–flow AVH Edition is a collection of Git extensions. It provides high-level repository operations for Vincent Driessen’s branching model. The AVH Edition adds more functionality to the existing git-flow and several of the internal commands have been rewritten to speed up the software.AVH edition of git-flow. To understand git-flow-avh , first we have to understand about git-flow.Gitflow Workflow is a Git workflow design that was first published and made popular by Vincent Driessen at nvie.
More Information: https://github.com/petervanderdoes/gitflow-avh
Steps:

1. Launch Terminal by pressing command+space, type terminal and hit Enter key.
2. Run

   ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" < /dev/null 2> /dev/null

3. Install

   brew install git-flow-avh

Done!