repoman: only assume cvs preserves mtimes
diff --git a/bin/repoman b/bin/repoman
index 4197900..076d404 100755
--- a/bin/repoman
+++ b/bin/repoman
@@ -547,7 +547,7 @@
 	options.if_modified = "n"
 
 # Disable copyright/mtime check if vcs does not preserve mtime (bug #324075).
-vcs_preserves_mtime = vcs not in ('git', 'svn')
+vcs_preserves_mtime = vcs in ('cvs',)
 
 vcs_local_opts = repoman_settings.get("REPOMAN_VCS_LOCAL_OPTS", "").split()
 vcs_global_opts = repoman_settings.get("REPOMAN_VCS_GLOBAL_OPTS")