diff --git a/rbtools/clients/git.py b/rbtools/clients/git.py
index a5f8e553b512457588fe348fdecda638dbdb82cc..7262edbaaca225619bcfca0ffc84f8ba383edeac 100644
--- a/rbtools/clients/git.py
+++ b/rbtools/clients/git.py
@@ -535,7 +535,13 @@ class GitClient(SCMClient):
             # changed files and run `git diff` on each un-excluded file
             # individually.
             changed_files_cmd = git_cmd + ['diff-tree'] + diff_cmd_params
-            if self.type == 'git':
+
+            if self.type in ('svn', 'perforce'):
+                # We don't want to send -u along to git diff-tree because it
+                # will generate diff information along with the list of
+                # changed files.
+                changed_files_cmd.remove('-u')
+            elif self.type == 'git':
                 changed_files_cmd.append('-r')
 
             changed_files = execute(