t / t5100 / info0001on commit check-ref-format doc: --branch validates and expands <branch> (89dd32a)
   1Author: A (zzz) U Thor (Comment)
   2Email: a.u.thor@example.com
   3Subject: a commit.
   4Date: Fri, 9 Jun 2006 00:44:16 -0700
   5