[Flow] Install TYPO3.Media

[Patric Eckhart]

Hey guys,

I have tried install TYPO3.Media at my Flow Instance to handle my image resources with that.

I add it to my composer file with php composer.phar require
"require": {
        "typo3/flow": "2.3.*",
        "typo3/welcome": "2.3.*",
        "doctrine/migrations": "@dev",
        "typo3/twitter-bootstrap": "~1.0",
        "imagine/imagine": "~0.6",
        "typo3/media": "~1.2"
    },

Then I run php composer.phar update
.. I become the following error
[RuntimeException]
  Failed to execute git status --porcelain --untracked-files=no
  fatal: Not a git repository (or any of the parent directories): .git

Can you help me...?