--- a/rakelib/scm.rb	Tue Nov 22 21:19:13 2016 +0000
+++ b/rakelib/scm.rb	Thu Nov 24 10:27:37 2016 +0000
@@ -15,7 +15,11 @@
   # visible here. To workaround, define them here. Ugly...
   module_function
   def sh(cmd, cwd: Dir.pwd, &block)
-    return RakeFileUtils::sh(cmd, cwd: cwd, &block)
+    begin 
+      return RakeFileUtils::sh(cmd, cwd: cwd, &block)
+    rescue
+      return false      
+    end
   end
 
   class CheckoutException < Exception