Fix repository information in HACKING.

HACKING

@@ -13,14 +13,10 @@ mailinglist. Your patch should be in unified diff format (the -u option
 to GNU diff) and it must comply with the coding style described below.
 
 Please send a patch against a recent version of this package. Patches
-against the Subversion trunk branch are most preferable. You can always
-access the trunk branch from
+against the Git master branch are most preferable. You can always
+clone the Thunar repository from
 
-  http://svn.xfce.org/svn/xfce/thunar/trunk
-
-or using an installed Subversion client
-
-  svn co http://svn.xfce.org/svn/xfce/thunar/trunk thunar
+  http://git.xfce.org/git/xfce/thunar
 
 
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