Interacting a local git repository with a subversion one has been very useful and is very common on old projects. The way to do that is by using the git svn commands. But sometimes there are situations where there is one large repository with several projects as subfolders in that repo.
Using the standard svn cloning command:
git clone my_svn_repo_server.com/repository
Will checkout the whole SVN repository (all subfolders, hence, all projects) into your local machine. This can be very large if the codebase and history is big, and very slow to interact with, since getting your local repository updated will involve getting changes from all other projects.
To make git clone a subdirectory from an SVN repository, use the following:
git svn init http://my_svn_server.com/repository/path/to/directory/of/project git svn fetch
This way you not only clone that subdirectory, but also you will get updates from only that folder, making faster code pulls and pushes to the central SVN repository.
While I consider a very bad practice to have one large Subversion repository with several projects inside it as subfolders, I’ve come across such setups several times and it drove me crazy to have to checkout the whole thing. Hope this helps out.