使用composer安装CakePHP 3.0时出错

我试着安装cakephp 3.0运行:

composer create-project -s dev cakephp/app cakedev

还有git cloning cakephp/app然后运行composer update但是我一直得到同样的错误:

Installing cakephp/cakephp (3.0.x-dev 0a2ff83)
    Cloning 0a2ff83156e5725b7e9339fb655e280ee70ce5aa
Executing command (CWD): git clone --no-checkout 'git://github.com/cakephp/cakephp.git' '/home/vagrant/www/cakedev/vendor/cakephp/cakephp' && cd '/home/vagrant/www/cakedev/vendor/cakephp/cakephp' && git remote add composer 'git://github.com/cakephp/cakephp.git' && git fetch composer
Failed: [Symfony\Component\Process\Exception\ProcessTimedOutException] The process "git clone --no-checkout 'git://github.com/cakephp/cakephp.git' '/home/vagrant/www/cakedev/vendor/cakephp/cakephp' && cd '/home/vagrant/www/cakedev/vendor/cakephp/cakephp' && git remote add composer 'git://github.com/cakephp/cakephp.git' && git fetch composer" exceeded the timeout of 300 seconds.
Failed to download cakephp/cakephp from source: The process "git clone --no-checkout 'git://github.com/cakephp/cakephp.git' '/home/vagrant/www/cakedev/vendor/cakephp/cakephp' && cd '/home/vagrant/www/cakedev/vendor/cakephp/cakephp' && git remote add composer 'git://github.com/cakephp/cakephp.git' && git fetch composer" exceeded the timeout of 300 seconds.
Now trying to download from dist
  - Installing cakephp/cakephp (3.0.x-dev 0a2ff83)

Failed: [RuntimeException] Could not delete /home/vagrant/www/cakedev/vendor/cakephp/cakephp/.git/objects/pack/tmp_pack_9VVOjS:

Reading ./composer.json
Loading config file ./composer.json



  [RuntimeException]

  Could not delete /home/vagrant/www/cakedev/vendor/cakephp/cakephp/.git/objects/pack/tmp_pack_9VVOjS:

我试图使用sudo运行命令,但也得到错误.

有任何想法吗？