New reference object for the updated name.
Current underlying reference of the branch.
Target name of the branch once the move is performed; this name is validated for consistency.
Overwrite existing branch.
0 on success, git_error_code.GIT_EINVALIDSPEC or an error code.
Move/rename an existing local branch reference.
The new branch name will be checked for validity. See git_tag_create() for rules about valid names.
Note that if the move succeeds, the old reference object will not + be valid anymore, and should be freed immediately by the user using + git_reference_free().