OpenSTA is an open-source STA tool by Parallax (hence a.k.a. Parallax STA/Static Timing Analyzer). User Manual is part of the repository.
Exporting the complete repo history in a form of patch files (based on https://randombrainworks.com/2017/02/17/git-moving-commits-between-repositories/):
cd path/to/orig/repo git format-patch --output-directory ../patches $(git rev-list --max-parents=0 HEAD) $(git rev-list HEAD -1)
Create a 2nd repo (here for testing purposes):
NewerOlder