text: {
    return new Promise((resolve, reject) => {
      if (!git.isClean(app)) {
        this.log("ERROR: repo not in clean state");
        return reject();
      }
  
      git.fetch(app, "upstream");
      git.checkout(app, "15-dev");
      git.pull(app);
      git.merge(app, "upstream/15-stable", false);
      this.log(chalk.green.bold(`OK!`));
      this.log(
        `You can now start cherry-picking commits to this branch using the "stable-prs" command.`
      );
      resolve();
    });
  }
  