https://gitlab.com/fdroid/fdroiddata/-/merge_requests/6827#note_346303108:

• git submodules could be used to integrate the dependencies with the app's repo
• srclibs are a way to achieve a comparable goal on our end

So you could "grep" for those keywords (submodules and srclib) in our .yml files to find some examples. Both are not that rare, so there should be several examples you could go by.

Reference: https://github.com/tigase/stork/issues/4

Documentation: https://gitlab.com/fdroid/fdroiddata/-/blob/master/CONTRIBUTING.md