code: def get_container_name(self, repo: str, branch: str, git_repo: Repo):
          
          return "arca_{}_{}_{}".format(
              self._arca.repo_id(repo),
              branch,
              self._arca.current_git_hash(repo, branch, git_repo, short=True)
          )
docs: Returns the name of the container used for the repo.