unused: Skip the refs/annex/last-index ref that git-annex recently started creating

This was unlikely to cause any problem, but it is unsightly to mention
normally hidden refs, and it might have done a bit of unnecessary work to
check that ref.

Sponsored-by: Noam Kremen on Patreon

CHANGELOG

@@ -12,6 +12,8 @@ git-annex (8.20210804) UNRELEASED; urgency=medium
     instead of in a separate pass at the end. This is supported for all
     special remotes on Linux (except for bittorrent), and for many
     on other OS's (except for adb, external, gcrypt, hook, and rsync).
+  * unused: Skip the refs/annex/last-index ref that git-annex recently
+    started creating.
 
  -- Joey Hess <id@joeyh.name>  Tue, 03 Aug 2021 12:22:45 -0400
 

Command/Unused.hs

@@ -241,6 +241,7 @@ withKeysReferencedDiffGitRefs refspec a = do
 	ourbranchend = S.cons (fromIntegral (ord '/')) (Git.fromRef' Annex.Branch.name)
 	ourbranches (_, b) = not (ourbranchend `S.isSuffixOf` b)
 		&& not ("refs/synced/" `S.isPrefixOf` b)
+		&& not ("refs/annex/" `S.isPrefixOf` b)
 		&& not (is_branchView (Git.Ref b))
 	getreflog rs = inRepo $ Git.RefLog.getMulti rs