Is there an archive format that supports appending diff's of an existing file, so that multiple versions of the same file are stored? PKZIP has a proprietary ex

Is there an archive format that supports appending diff's of an existing file, so that multiple versions of the same file are stored? PKZIP has a proprietary extension (supposedly), but I couldn't find any open version of that. (I was thinking of a creating a version control system whose .git directory equivalent is basically an archive file that can easily be emailed, etc.)