diff -r 2009d84f245a -r f9b2d996ffa5 mercurial/hook.py
--- a/mercurial/hook.py	Sun Jul 15 23:46:09 2018 -0400
+++ b/mercurial/hook.py	Sun Jul 15 23:51:43 2018 -0400
@@ -140,8 +140,10 @@
         env['HG_' + k.upper()] = v
 
     if ui.configbool('hooks', 'tonative.%s' % name, False):
-        ui.note(_('converting hook "%s" to native\n') % name)
+        oldcmd = cmd
         cmd = procutil.shelltonative(cmd, env)
+        if cmd != oldcmd:
+            ui.note(_('converting hook "%s" to native\n') % name)
 
     ui.note(_("running hook %s: %s\n") % (name, cmd))