git subtree add -P <prefix> <commit>git subtree add -P <prefix> <repository> <ref>git subtree pull -P <prefix> <repository> <ref>git subtree push -P <prefix> <repository> <ref>git subtree merge -P <prefix> <commit>git subtree split -P <prefix> [OPTIONS] [<commit>]This is an alternative to using a [submodule](<https://git-scm.com/docs/git-submodule>)