git-commit-graph
Write and verify Git commit-graph files.
TLDR
Write a commit-graph file for the packed commits in the repository's local .git directory
$ git commit-graph write
Write a commit-graph file containing all reachable commits
$ git show-ref --hash | git commit-graph write --stdin-commits
Write a commit-graph file containing all commits in the current commit-graph file along with those reachable from HEAD
$ git rev-parse [HEAD] | git commit-graph write --stdin-commits --append