GitLab's contributions to Git 2.44.0

This post details GitLab's contributions to Git 2.44.0, specifically highlighting the upstreaming of `git-replay` for in-memory rebasing without requiring a worktree, and improvements to commit-graph object existence checks to prevent performance regressions. It also discusses the ongoing work to prepare Git for a new 'reftable' ref backend, addressing limitations of the current 'files' backend in large monorepos.