message: Fix client UTs that fail with latest server bits
diff: @@ -98,8 +98,10 @@ export class TestHistorian implements IHistorian {
  let commit = await this.commits.findOne({ _id: sha });
  if (!commit) {
  const ref = await this.getRef(`refs/heads/${sha}`);
  + if (ref !== undefined) {
  commit = await this.commits.findOne({ _id: ref.object.sha });
  }
  + }
  if (commit) {
  return {
  author: {} as Partial<git.IAuthor> as git.IAuthor,
  