[PATCH 2/2] t7900: clean up some broken refs

["Derrick Stolee via GitGitGadget" <gitgitgadget@gmail.com>]

From: Derrick Stolee <dstolee@microsoft.com>

The tests for the 'prefetch' task create remotes and fetch refs into
'refs/prefetch/<remote>/' and tags into 'refs/tags/'. These tests use
the remotes to create objects not intended to be seen by the "local"
repository.

In that sense, the incrmental-repack tasks did not have these objects
and refs in mind. That test replaces the object directory with a
specific pack-file layout for testing the batch-size logic. However,
this causes some operations to start showing warnings such as:

 error: refs/prefetch/remote1/one does not point to a valid object!
 error: refs/tags/one does not point to a valid object!

This only shows up if you run the tests verbosely and watch the output.
It caught my eye and I _thought_ that there was a bug where 'git gc' or
'git repack' wouldn't check 'refs/prefetch/' before pruning objects.
That is incorrect. Those commands do handle 'refs/prefetch/' correctly.

All that is left is to clean up the tests in t7900-maintenance.sh to
remove these tags and refs that are not being repacked for the
incremental-repack tests.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
---
 t/t7900-maintenance.sh | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/t/t7900-maintenance.sh b/t/t7900-maintenance.sh
index f9031cbb44b..6be9d42767a 100755
--- a/t/t7900-maintenance.sh
+++ b/t/t7900-maintenance.sh
@@ -256,6 +256,11 @@ test_expect_success 'incremental-repack task' '
 	HEAD
 	^HEAD~1
 	EOF
+
+	# Replace the object directory with this pack layout.
+	# However, it does not include all objects from the remotes.
+	rm -rf .git/refs/prefetch &&
+	rm -rf .git/refs/tags &&
 	rm -f $packDir/pack-* &&
 	rm -f $packDir/loose-* &&
 	ls $packDir/*.pack >packs-before &&
-- 
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