fetch-github-archive-url.js

const GITHUB_TEAM_API_URL_PREFIX = 'https://api.github.com/repos/SOME_TEAM';
const githubArchiveUrl = ({ repoName, branch }) =>
  `${GITHUB_TEAM_API_URL_PREFIX}/${repoName}/tarball/${branch}`;

const getGithubArchiveRedirectUrl = ({ repoName, branch, githubToken }) => {
	const url = githubArchiveUrl({ repoName, branch });

	return fetch(url, {
		headers: {
			Authorization: `token ${githubToken}`
		},
		redirect: 'manual' // Don't follow redirect, just want the URL
	}).then(res => {
		if (res.status !== 302) {
			throw new Error(`Unexpected response for ${url} (${status})`);
		}

		const { headers: { _headers: { location } } } = res;
		const [ redirectUrl ] = location || [];

		return redirectUrl;
	});
};

// To call
await getGithubArchiveRedirectUrl({ repoName, branch, githubToken });