They have everything the same with old subtree. From commit message, history, object ID, commit ID. git-subtree(1) also allows splitting subtree. git-subtree(

They have everything the same with old subtree. From commit message, history, object ID, commit ID. git-subtree(1) also allows splitting subtree. git-subtree(1) uses plumbing git command, which is stable interface, unlike this one, which uses porcelain command. IIRC, Git’s maintainer uses git-subtree(1) to merge gitk and git-gui to Git.