diff -r 28a97cf212af -r 02c35e640b3c hgext/mq.py
--- a/hgext/mq.py	Tue Feb 06 08:54:36 2018 -0800
+++ b/hgext/mq.py	Tue Feb 06 08:55:54 2018 -0800
@@ -553,10 +553,8 @@
             for patchfn in patches:
                 patchf = self.opener(patchfn, 'r')
                 # if the patch was a git patch, refresh it as a git patch
-                for line in patchf:
-                    if line.startswith('diff --git'):
-                        diffopts.git = True
-                        break
+                diffopts.git = any(line.startswith('diff --git')
+                                   for line in patchf)
                 patchf.close()
         return diffopts