t5328: avoid top-level directory changes

In a similar spirit as the last commit, avoid top-level directory
changes in the last remaining commit-graph related test, t5328.

Signed-off-by: Taylor Blau <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: ttaylorr

t/t5328-commit-graph-64bit-time.sh

@@ -37,39 +37,39 @@ test_expect_success 'lower layers have overflow chunk' '
 graph_git_behavior 'overflow' '' HEAD~2 HEAD
 
 test_expect_success 'set up and verify repo with generation data overflow chunk' '
-	mkdir repo &&
-	cd repo &&
-	git init &&
-	test_commit --date "$UNIX_EPOCH_ZERO" 1 &&
-	test_commit 2 &&
-	test_commit --date "$UNIX_EPOCH_ZERO" 3 &&
-	git commit-graph write --reachable &&
-	graph_read_expect 3 generation_data &&
-	test_commit --date "$FUTURE_DATE" 4 &&
-	test_commit 5 &&
-	test_commit --date "$UNIX_EPOCH_ZERO" 6 &&
-	git branch left &&
-	git reset --hard 3 &&
-	test_commit 7 &&
-	test_commit --date "$FUTURE_DATE" 8 &&
-	test_commit 9 &&
-	git branch right &&
-	git reset --hard 3 &&
-	test_merge M left right &&
-	git commit-graph write --reachable &&
-	graph_read_expect 10 "generation_data generation_data_overflow" &&
-	git commit-graph verify
+	git init repo &&
+	(
+		cd repo &&
+		test_commit --date "$UNIX_EPOCH_ZERO" 1 &&
+		test_commit 2 &&
+		test_commit --date "$UNIX_EPOCH_ZERO" 3 &&
+		git commit-graph write --reachable &&
+		graph_read_expect 3 generation_data &&
+		test_commit --date "$FUTURE_DATE" 4 &&
+		test_commit 5 &&
+		test_commit --date "$UNIX_EPOCH_ZERO" 6 &&
+		git branch left &&
+		git reset --hard 3 &&
+		test_commit 7 &&
+		test_commit --date "$FUTURE_DATE" 8 &&
+		test_commit 9 &&
+		git branch right &&
+		git reset --hard 3 &&
+		test_merge M left right &&
+		git commit-graph write --reachable &&
+		graph_read_expect 10 "generation_data generation_data_overflow" &&
+		git commit-graph verify
+	)
 '
 
 graph_git_behavior 'overflow 2' repo left right
 
 test_expect_success 'single commit with generation data exceeding UINT32_MAX' '
 	git init repo-uint32-max &&
-	cd repo-uint32-max &&
-	test_commit --date "@4294967297 +0000" 1 &&
-	git commit-graph write --reachable &&
-	graph_read_expect 1 "generation_data" &&
-	git commit-graph verify
+	test_commit -C repo-uint32-max --date "@4294967297 +0000" 1 &&
+	git -C repo-uint32-max commit-graph write --reachable &&
+	graph_read_expect -C repo-uint32-max 1 "generation_data" &&
+	git -C repo-uint32-max commit-graph verify
 '
 
 test_done