Function fetch

packages/computer/src/git/cli.test.ts:282–285

(options = {})

      calls.checkout.push(options);
    },
    async fetch(options = {}) {
      calls.fetch.push(options);
      return fakes.fetch?.() ?? { defaultBranch: "main", fetchHead: null };
    },
    async push(options = {}) {
      calls.push.push(options);
      return fakes.push?.() ?? { ok: true, error: null, refs: {} };