diff --git a/replay.c b/replay.c
index 313fb2a768..20560e792b 100644
--- a/replay.c
+++ b/replay.c
@@ -338,6 +338,8 @@ int replay_revisions(struct repository *repo, struct rev_info *revs,
 					   &onto->object.oid,
 					   &last_commit->object.oid);
 
+	out->final_oid = last_commit->object.oid;
+
 	ret = 0;
 
 out:
diff --git a/replay.h b/replay.h
index 84bc8a7a5b..f8f9889112 100644
--- a/replay.h
+++ b/replay.h
@@ -46,6 +46,22 @@ struct replay_result {
 
 	/* Set to true in case the replay failed with a merge conflict. */
 	bool merge_conflict;
+
+	/*
+	 * The final object ID that was rewritten. Note that this field has
+	 * somewhat special semantics and may or may not be what you want:
+	 *
+	 *   - If no commits were rewritten it will remain uninitialized.
+	 *
+	 *   - If a thicket of branches is rewritten it is undefined in which
+	 *     order those branches will be rewritten, and thus the final object
+	 *     ID may point to a different commit than you'd expect.
+	 *
+	 * That being said, this field can still be useful when you know that
+	 * you only replay a single strand of commits. In that case, the final
+	 * commit will point to the tip of the rewritten strand of commits.
+	 */
+	struct object_id final_oid;
 };
 
 void replay_result_release(struct replay_result *result);