如果没有引用指向 1 ， 2 ， 3 和 4 ，它们悬空了，将被 gc 删除.
您还在哪里看到这些提交?
还是有些头或标签指向那些提交吗?

If no ref points to 1, 2, 3 and 4, they are dangling and will be removed by gc.
Where do you still see those commits?
Do still some heads or tags point to those commits?