A UserScript to see which Github forks are ahead and other info

UserScript.js

// ==UserScript==
// @name         Github is Fork Ahead
// @version      0.1
// @description  Shows how far ahead/behind a fork is from upstream when viewing fork page on github
// @match        https://github.com/*/*/network/members
// ==/UserScript==

async function fetchLastCommit(partial_url) {
  const response = await fetch('https://api.github.com/repos/' + partial_url + '/commits?page=1&per_page=1')
  const commitJson = await response.json();
  return commitJson;
}

async function fetchFork(fork_url) {
  const response = await fetch(fork_url)
  const responseText = await response.text();
  return responseText;
}

// some of this code is based on https://stackoverflow.com/a/68335748
const repo_tags = [...document.querySelectorAll('div.repo a:last-of-type')].slice(1);
for (const repo_tag of repo_tags) {
    const partial_url = repo_tag.href.replace("https://github.com/","")
    fetchFork(repo_tag.href).then(responseText => {
        var ahead_text = responseText.match(/This branch is.*/).pop().replace('This branch', '');
        fetchLastCommit(partial_url).then(commitJson => {
            var formatted_date = new Date(commitJson[0].commit.author.date).toLocaleString();
            repo_tag.outerHTML += ("<span>" + ahead_text +
                                   " | last-author: <a href='/" + commitJson[0].commit.author.name + "'>" + commitJson[0].commit.author.name + "</a>" +
                                   " | commit-date: " + formatted_date +
                                   " | message: " + commitJson[0].commit.message +
                                   "</span>")
        });
    });
}

Screenshot: