diff --git a/scripts/artifacts.sh b/scripts/artifacts.sh
index f509cd7..9c49037 100755
--- a/scripts/artifacts.sh
+++ b/scripts/artifacts.sh
@@ -136,9 +136,14 @@ newest() {
 
   # Unquoted on purpose: the pathspec must word-split into separate args.
   # Globbing is off script-wide (`set -f`).
+  #
+  # Newest committer time wins. Two commits pushed together can share a
+  # second, and then the one git log lists first (the descendant, which holds
+  # both changes) wins: a stable sort on the timestamp alone keeps git's order
+  # among equals. Sorting on the whole line would break the tie by hash.
   # shellcheck disable=SC2086
   set -- "$(cd "$ROOT" && git log --format='%ct %H' HEAD -- $paths \
-            | sort -n | tail -1)"
+            | sort -s -k1,1nr | head -1)"
   if [ -z "$1" ]; then
     echo "artifacts.sh: no commit touches this artifact's shipped files" >&2
     exit 1