The Debian packaging of git-annex is maintained in git, using the
merging workflow described in dgit-maint-merge(7).  There isn't a
patch queue that can be represented as a quilt series.

A detailed breakdown of the changes is available from their canonical
representation - git commits in the packaging repository.  For
example, to see the changes made by the Debian maintainer in the first
upload of upstream version 1.2.3, you could use:

    % git clone https://git.dgit.debian.org/git-annex
    % cd git-annex
    % git log --oneline 1.2.3..debian/1.2.3-1 -- . ':!debian'

(If you have dgit, use `dgit clone git-annex`, rather than plain `git
clone`.)

A single combined diff, containing all the changes, follows.
--- git-annex-7.20181211.orig/COPYRIGHT
+++ git-annex-7.20181211/COPYRIGHT
@@ -54,9 +54,6 @@ Files: static/jquery*
 Copyright: © 2005-2011 by John Resig, Branden Aaron & Jörn Zaefferer
            © 2011 The Dojo Foundation
 License: Expat or GPL-2
- The full text of version 2 of the GPL is distributed in
- /usr/share/common-licenses/GPL-2 on Debian systems. The text of the Expat
- license is in the Expat section below.
 
 Files: static/*/bootstrap* static/*/glyphicons-halflings*
 Copyright: 2012-2014 Twitter, Inc.
@@ -118,6 +115,10 @@ License: GPL-3+
  this package's source, or in /usr/share/common-licenses/GPL-3 on
  Debian systems.
 
+License: GPL-2
+ The full text of version 2 of the GPL is distributed in
+ /usr/share/common-licenses/GPL-2 on Debian systems.
+
 License: BSD-2-clause
  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions
--- git-annex-7.20181211.orig/Test.hs
+++ git-annex-7.20181211/Test.hs
@@ -145,8 +145,8 @@ tests crippledfilesystem opts = testGrou
 	map (\(d, te) -> withTestMode te initTests (unitTests d)) testmodes
   where
 	testmodes = catMaybes
-		[ Just ("v7 unlocked", (testMode opts (RepoVersion 7)) { unlockedFiles = True })
-		, unlesscrippled ("v5", testMode opts (RepoVersion 5))
+		-- Just ("v7 unlocked", (testMode opts (RepoVersion 7)) { unlockedFiles = True })
+		[ unlesscrippled ("v5", testMode opts (RepoVersion 5))
 		, unlesscrippled ("v7 locked", testMode opts (RepoVersion 7))
 		, Just ("v5 direct", (testMode opts (RepoVersion 5)) { forceDirect = True })
 		]
