submodule: don't rely on overlayed config when setting diffopts

diff --git a/t/t5502-quickfetch.sh b/t/t5502-quickfetch.sh
index 16eadd6b68664884836976aafb6dcbb582603c09..7a46cbdbe687d080def03f41721fd0920ccd316f 100755 (executable)
--- a/t/t5502-quickfetch.sh
+++ b/t/t5502-quickfetch.sh
@@ -57,7 +57,7 @@ test_expect_success 'copy commit and tree but not blob by hand' '
                cd cloned &&
                git count-objects | sed -e "s/ *objects,.*//"
        ) ) &&
-       test $cnt -eq 6
+       test $cnt -eq 6 &&
 
        blob=$(git rev-parse HEAD:file | sed -e "s|..|&/|") &&
        test -f "cloned/.git/objects/$blob" &&
@@ -119,4 +119,24 @@ test_expect_success 'quickfetch should not copy from alternate' '
 
 '
 
+test_expect_success 'quickfetch should handle ~1000 refs (on Windows)' '
+
+       git gc &&
+       head=$(git rev-parse HEAD) &&
+       branchprefix="$head refs/heads/branch" &&
+       for i in 0 1 2 3 4 5 6 7 8 9; do
+               for j in 0 1 2 3 4 5 6 7 8 9; do
+                       for k in 0 1 2 3 4 5 6 7 8 9; do
+                               echo "$branchprefix$i$j$k" >> .git/packed-refs
+                       done
+               done
+       done &&
+       (
+               cd cloned &&
+               git fetch &&
+               git fetch
+       )
+
+'
+
 test_done