Index: head/sys/conf/newvers.sh
===================================================================
--- head/sys/conf/newvers.sh
+++ head/sys/conf/newvers.sh
@@ -162,29 +162,7 @@
 
 git_tree_modified()
 {
-	# git diff-index lists both files that are known to have changes as
-	# well as those with metadata that does not match what is recorded in
-	# git's internal state.  The latter case is indicated by an all-zero
-	# destination file hash.
-
-	local fifo
-
-	fifo=$(mktemp -u)
-	mkfifo -m 600 $fifo || exit 1
-	$git_cmd --work-tree=${VCSTOP} diff-index HEAD > $fifo &
-	while read smode dmode ssha dsha status file; do
-		if ! expr $dsha : '^00*$' >/dev/null; then
-			rm $fifo
-			return 0
-		fi
-		if ! $git_cmd --work-tree=${VCSTOP} diff --quiet -- "${file}"; then
-			rm $fifo
-			return 0
-		fi
-	done < $fifo
-	# No files with content differences.
-	rm $fifo
-	return 1
+	$git_cmd "--work-tree=${VCSTOP}" -c core.checkStat=minimal -c core.fileMode=off diff --quiet
 }
 
 LC_ALL=C; export LC_ALL