Mention shortest command to track remote branches

Author: jojva

book/03-git-branching/sections/remote-branches.asc

@@ -138,6 +138,15 @@ Branch serverfix set up to track remote branch serverfix from origin.
 Switched to a new branch 'serverfix'
 ----
 
+In fact, this is so common that there's even a shortcut for that shortcut. If the branch name you're trying to checkout (a) doesn't exist and (b) exactly matches a name on only one remote, Git will create a tracking branch for you:
+
+[source,console]
+----
+$ git checkout serverfix
+Branch serverfix set up to track remote branch serverfix from origin.
+Switched to a new branch 'serverfix'
+----
+
 To set up a local branch with a different name than the remote branch, you can easily use the first version with a different local branch name:
 
 [source,console]