Robert Speicher authored Apr 20, 2020 and Jacob Vosmaer committed Apr 20, 2020

The `Gitlab::Git::Ref` initializer, which `Branch` inherits, already
removes the `refs/heads|tags/` prefix from the provided name via
`Gitlab::Git.ref_name`, so there should be no functional difference to
providing the "canonical name".

In a future commit, we'll store the canonical name in addition to the
non-prefixed name.