message: Allow git createBranch to take it fetchOpts
diff: @@ -29,7 +29,7 @@ class Change {
  return new this(repo, targetBranch, null, [], null, null, null);
  }
  - static async createBranch(repo, parentId, targetBranch) {
  + static async createBranch(repo, parentId, targetBranch, fetchOpts) {
  let parentCommit;
  if (parentId) {
  parentCommit = await Commit.lookup(repo, parentId);
  @@ -41,7 +41,7 @@ class Change {
  parentTree = await parentCommit.getTree();
  parents.push(parentCommit);
  }
  - return new this(repo, targetBranch, parentTree, parents, parentCommit, null, null);
  + return new this(repo, targetBranch, parentTree, parents, parentCommit, fetchOpts, null);
  }
  static async create(repo, parentId, targetBranch, fetchOpts) {
  