src/Composer/Repository/Vcs/GitHubDriver.php
public function getTags()
    {
        if ($this->gitDriver) {
            return $this->gitDriver->getTags();
        }
        if (null === $this->tags) {
            $this->tags = array();
            $resource = $this->getApiUrl() . '/repos/'.$this->owner.'/'.$this->repository.'/tags?per_page=100';

            do {
                $tagsData = JsonFile::parseJson($this->getContents($resource), $resource);
                foreach ($tagsData as $tag) {
                    $this->tags[$tag['name']] = $tag['commit']['sha'];
                }

                $resource = $this->getNextPage();
            } while ($resource);
        }

        return $this->tags;
    }
public function getTags()
    {
        if ($this->gitDriver) {
            return $this->gitDriver->getTags();
        }
        if (null === $this->tags) {
            $this->tags = array();
            $resource = $this->getApiUrl() . '/repos/'.$this->owner.'/'.$this->repository.'/tags?per_page=100';

            do {
                $tagsData = JsonFile::parseJson($this->getContents($resource), $resource);
                foreach ($tagsData as $tag) {
                    $this->tags[$tag['name']] = $tag['commit']['sha'];
                }

                $resource = $this->getNextPage();
            } while ($resource);
        }

        return $this->tags;
    }
{@inheritDoc}