diff -Nru dgit-3.2/debian/changelog dgit-3.2+rpi1/debian/changelog
--- dgit-3.2/debian/changelog	2017-01-12 02:11:34.000000000 +0000
+++ dgit-3.2+rpi1/debian/changelog	2017-01-17 19:52:37.000000000 +0000
@@ -1,3 +1,10 @@
+dgit (3.2+rpi1) stretch-staging; urgency=medium
+
+  * Add dummy implementation of file_in_archive_aptget copied from
+    file_in_archive_dummycat (partially fixes: 851697)
+
+ -- Peter Michael Green <plugwash@raspbian.org>  Tue, 17 Jan 2017 19:52:37 +0000
+
 dgit (3.2) unstable; urgency=medium
 
   Bugfixes:
diff -Nru dgit-3.2/dgit dgit-3.2+rpi1/dgit
--- dgit-3.2/dgit	2017-01-12 01:36:35.000000000 +0000
+++ dgit-3.2+rpi1/dgit	2017-01-17 19:52:11.000000000 +0000
@@ -1318,6 +1318,8 @@
     return [ (getfield $pre_dsc, 'Version'), $uri ];
 }
 
+sub file_in_archive_aptget () { return undef; }
+
 #---------- `dummyapicat' archive query method ----------
 
 sub archive_query_dummycatapi { archive_query_ftpmasterapi @_; }