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Discussion on: Git Submodules Revisited

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Dexter Marks-Barber

On the opening page it briefly shows the branch config option:
git-scm.com/docs/git-submodule#git...

[submodule "<path>"]
    path = <path>
    url = <repo>
    branch = <branch> // <-- magical

We use branches as versions, so each minor change to a submodule increments the branch property. We then run:

git submodule sync
git pull --recurse-submodule

...to make sure that everything is updated. You're right in saying that it doesn't seem too well documented though.