X (volgo.Volgo.Vcs.Trait.Branch.Make.X)

type t

val rename_current_branch : 
  t ->
  repo_root:Volgo__.Repo_root.t ->
  to_:Branch_name.t ->
  (unit, Err.t) Stdlib.Result.t

This translates to git branch --move NAME, which is used to enforce the name of a default branch during tests.