Add git checkout-last alias

README.md

@@ -15,6 +15,8 @@ than remember the plumbing term of a specific command.
 * `delete` deletes an existing branch, shorthand for `git branch -D`.
 * `name` the name of the current branch.
 * `last` the name of the last branch checked out before the current branch.
+* `checkout-last` checkout the last branch, shorthand for
+  `git checkout $(git last)`.
 * `publish` push and set the tracking branch of a local branch to origin,
   shorthand for `git push -u origin <branch>`.
 * `unpublish` delete a remote branch, shorthand for `git push origin :<branch>`.

config

@@ -11,6 +11,7 @@
 	delete = branch -D
 	name = rev-parse --abbrev-ref HEAD
 	last = !sh -c 'git reflog | grep \" checkout: moving from\" | head -n 1 | awk \"{ print \\$6 }\"'
+	checkout-last = !git checkout `git last`
 
 	publish = !git push -u origin `git name`
 	unpublish = !git push -u origin :`git name`