I have a research project where I want to save some but not all versions. Those that should be saved are tagged. I want to create a repository (and archive it) that contains only those files. It is, so to say, the inverse of --unused.

I tried to clone a present repository to an new folder and move there only files that are referenced by some ref (branch or tag).

But git annex does nothing:

git clone my-repo  repo-archive
cd repo-archive
git annex init
git annex copy --to=here --not --unused

However, git annex exits without copying any files, my repo is still empty afterwards.

I also tried git annex findkeys --not --unused, but it says invalid option --unused

In real life I have multiple repositories that all have part of the files I want, so I cannot just make a repo that has all versions of all files and then drop --unused. That also would take too much storage.

How can I do this?