def get_common_files(self):
        """
        Fetch the hpo-annotation-data
        [repository](https://github.com/monarch-initiative/hpo-annotation-data.git)
        as a tarball

        :return:

        """
        # curl -sLu "username:personal-acess-token" \
        # GITAPI + "/hpo-annotation-data/tarball/master" > hpoa.tgz

        repo_dir = self.rawdir + '/git'
        username = CONF['user']['hpoa']
        response = requests.get(
            GITAPI + '/hpo-annotation-data/tarball/master',
            auth=(username, CONF['keys'][username]))

        with open(self.rawdir + '/hpoa.tgz', 'wb') as tgz:
            tgz.write(response.content)

        if os.path.isdir(repo_dir):  # scoarched earth approach
            shutil.rmtree(repo_dir)
        os.mkdir(repo_dir)

        with tarfile.open('raw/hpoa/hpoa.tgz', 'r') as tarball:
            tarball.extractall(repo_dir)

        # TO-DO add this to the dataset object
        # hmm ...kay... have git commit-hash in tarball repo name

        repo_hash = glob.glob(
            str(
                '/'.join(
                    (self.rawdir, 'git', 'monarch-initiative-hpo-annotation-data-*')
                )))[-42:]

        print(repo_hash)
        repo_hash = str(repo_hash)
        # (note this makes little sense as it is a private repo)
        self.dataset.setFileAccessUrl(
            '/'.join((
                'https://github.com/monarch-initiative/hpo-annotation-data/tree',
                repo_hash)))

        return
Fetch the hpo-annotation-data
        [repository](https://github.com/monarch-initiative/hpo-annotation-data.git)
        as a tarball

        :return: