Tutorial: Use the new StGit repo URL in clone example

Signed-off-by: Karl Wiberg <kha@treskal.com>
diff --git a/Documentation/tutorial.txt b/Documentation/tutorial.txt
index b418a77..7484d70 100644
--- a/Documentation/tutorial.txt
+++ b/Documentation/tutorial.txt
@@ -40,7 +40,7 @@
 that you have already created, using +git init+ or +git clone+. So get
 one of those; if you don't have one at hand, try for example
 
-  $ git clone http://homepage.ntlworld.com/cmarinas/stgit.git
+  $ git clone git://repo.or.cz/stgit.git
   $ cd stgit
 
 Before you can create StGit patches, you have to run linkstg:init[]: