before the commit log message is a short name you can use to
name the commit. In the above example, 'master' and 'mybranch'
are branch heads. 'master^' is the first parent of 'master'
-branch head. Please see linkgit:git-rev-parse[1] if you want to
+branch head. Please see linkgit:gitrevisions[1] if you want to
see more complex cases.
[NOTE]