git ≥ 2.23‑style “nuke‑and‑pave”. Gets you out of everything, even worktrees!

zshrc

fresh() {
  # 0) escape half‑finished merges / rebases (no‑ops if nothing to abort)
  git merge --abort 2>/dev/null || git rebase --abort 2>/dev/null || :

  git fetch --prune --no-auto-maintenance --quiet origin &&          # 1  refs up‑to‑date fast  [oai_citation:0‡git-scm.com](https://git-scm.com/docs/git-fetch)
  git switch --discard-changes --recurse-submodules -C main origin/main &&   # 2  hard‑reset + checkout incl. submodules 
  git clean -ffdx &&                                                 # 3  wipe every untracked/ignored artefact 
  git for-each-ref --format='%(refname:short)' --merged main refs/heads \
      | grep -v '^main$' | xargs -r git branch -D                    # 4  trash merged locals in one hit
  clear
}

Lots of cool stuff in newer gits:

•	--no‑auto‑maintenance on git fetch sidesteps the automatic git maintenance run that fetch would normally trigger, so the network round‑trip isn’t followed by an unexpected GC stint  
•	--recurse‑submodules on git switch resets submodules to the commit recorded in origin/main—no need for a separate git submodule update run 
•	clean -ffdx (“force, force, directories, x = include .gitignored stuff”) leaves nothing behind from previous builds 
•	Deleting merged branches now uses git for‑each‑ref → single git branch -D instead of one git branch -D per branch, so it’s still just one extra Git invocation.