hgext/mq.py

--- a/hgext/mq.py	Sun Apr 01 15:41:16 2018 -0700
+++ b/hgext/mq.py	Mon Apr 02 08:46:07 2018 -0700
@@ -2505,7 +2505,7 @@
     ui.note(_('cloning main repository\n'))
     sr, dr = hg.clone(ui, opts, sr.url(), dest,
                       pull=opts.get('pull'),
-                      rev=destrev,
+                      revs=destrev,
                       update=False,
                       stream=opts.get('uncompressed'))