I believe you are looking for the following behaviour:
There is an easier way to do this as well, if you prefer to not manually fetch and merge in the subdirectory. If you run git submodule update --remote, Git will go into your submodules and fetch and update for you
Sourcetree does not currently support that functionality
Supported Platforms macOS Windows We recently introduced support for additional hosting services such as GitHub Enterprise, GitLab (Cloud, Community Edition, Enterprise Edition), and...
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