src/Composer/Repository/Vcs/GitHubDriver.php
public function getDist($identifier)
    {
        $url = $this->getApiUrl() . '/repos/'.$this->owner.'/'.$this->repository.'/zipball/'.$identifier;

        return array('type' => 'zip', 'url' => $url, 'reference' => $identifier, 'shasum' => '');
    }
public function getDist($identifier)
    {
        $url = $this->getApiUrl() . '/repos/'.$this->owner.'/'.$this->repository.'/zipball/'.$identifier;

        return array('type' => 'zip', 'url' => $url, 'reference' => $identifier, 'shasum' => '');
    }
{@inheritDoc}