git usuń pliki ze starych zatrzymów
git filter-branch --index-filter
'git rm --cached --ignore-unmatch path/to/mylarge_file'
--tag-name-filter cat -- --all
filter-branch keeps backups too, so the size of the repo won't decrease immediately unless you expire the reflogs and garbage collect:
rm -Rf .git/refs/original # careful
git gc --aggressive --prune=now # danger
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