add

Use git-subtree to import a Git repository into another repository:

$ git subtree add --prefix <prefix> <repository> <revision>

For instance, to import the repository [email protected]:remarkablemark/example.git into the current repository’s subdirectory ./example/:

$ git subtree add -P example [email protected]:remarkablemark/example.git master

You can check the commit output with git show:

$ git show
Add 'examaple/' from commit 'e28d0c5ef4c8e69eacea877af979923926f0c5e9'

git-subtree-dir: example
git-subtree-mainline: 32120bbb677c6786d7219de6c8c83b4bb8fc9ba0
git-subtree-split: e28d0c5ef4c8e69eacea877af979923926f0c5e9

pull

To update to the latest revision on the subtree repository:

$ git subtree pull --prefix <prefix> <repository> <revision>

In our example, we would do the following:

$ git subtree pull -P example [email protected]:remarkablemark/example.git master