如何在子模块中使Git检出必要的提交？

Question

git ls-tree -r HEAD | grep commit | while read _1 _2 ID PATH; do 
     (cd $PATH; git checkout $ID;)
done

I suspect there should be normal Git command for this, including to do it recursively for nested submodules.

How to do it in normal way?

Answer 1

看起来只是普通的git submodule update 。