I have a git working directory and have added to .git/objects/info/alternates so that this working directory does not need to store duplicate data that's already in another working directory on my machine. (This is what git clone --reference=DIRECTORY does). However, duplicate objects already stored in the working directory aren't deleted from my .git/ directory. This means the .git/ directory stays large.

How do I get rid of the duplicate objects so the .git/ directory is smaller?

git reference diskspace
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