src/Composer/Repository/Vcs/GitDriver.php
public function getBranches()
    {
        if (null === $this->branches) {
            $branches = array();

            $this->process->execute('git branch --no-color --no-abbrev -v', $output, $this->repoDir);
            foreach ($this->process->splitLines($output) as $branch) {
                if ($branch && !preg_match('{^ *[^/]+/HEAD }', $branch)) {
                    if (preg_match('{^(?:\* )? *(\S+) *([a-f0-9]+)(?: .*)?$}', $branch, $match)) {
                        $branches[$match[1]] = $match[2];
                    }
                }
            }

            $this->branches = $branches;
        }

        return $this->branches;
    }
public function getBranches()
    {
        if (null === $this->branches) {
            $branches = array();

            $this->process->execute('git branch --no-color --no-abbrev -v', $output, $this->repoDir);
            foreach ($this->process->splitLines($output) as $branch) {
                if ($branch && !preg_match('{^ *[^/]+/HEAD }', $branch)) {
                    if (preg_match('{^(?:\* )? *(\S+) *([a-f0-9]+)(?: .*)?$}', $branch, $match)) {
                        $branches[$match[1]] = $match[2];
                    }
                }
            }

            $this->branches = $branches;
        }

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