feat: fetch data for prs that need retest

src/lib/get_commits.mjs

@@ -0,0 +1,23 @@
+function formatCommit(commit) {
+  return {
+    sha: commit.sha,
+    owner: commit.committer.login,
+    message: commit.commit.message,
+  };
+}
+
+function formatCommits(commits, lastOnly) {
+  if (lastOnly) return formatCommit(commits.pop());
+  return commits.map(c => formatCommit(c));
+}
+
+export default async function getCommits(repo, id, lastOnly = true) {
+  const commits = await repo.pulls(id).commits.fetch();
+
+  if (commits.lastPage) {
+    const { items } = await commits.lastPage.fetch();
+    return formatCommits(items, lastOnly);
+  }
+
+  return formatCommits(commits.items, lastOnly);
+}