Install this package and set up your project to use it:

box install commandbox-githooks
cd my-git-project
box githooks install

Add your scripts to a githooks key in the box.json:

{
  "githooks": {
    "preCommit": "testbox run",
    "postCheckout": [
      "install",
      "!npm install",
      "!gulp"
    ]
  }
}

Note: In order to work correctly, the path to box or box.exe must be in your system's PATH variable.