# Check if you have a partial clone
git config extensions.partialClone

# Download missing objects in background
git backfill

# Download with custom batch size
git backfill --batch-size=1000

# Respect sparse-checkout patterns (only fetch needed files)
git backfill --sparse

# Check progress
git backfill --verbose

# Clone without blobs
git clone --filter=blob:none https://github.com/large/repo.git
cd repo

# Later, prefetch all missing objects efficiently
git backfill

# Clone with both optimizations
git clone --filter=blob:none --sparse https://github.com/monorepo.git
cd monorepo
git sparse-checkout set src/api

# Fetch only needed objects
git backfill --sparse

# In CI pipeline - fetch only what's needed
git clone --filter=blob:none --depth=1 repo
git backfill --sparse
# Much faster than full clone

git fetch --unshallow
# Downloads 500MB in random order
# Poor delta compression

git backfill
# Downloads 150MB with optimized delta compression (70% reduction)
# Groups objects by path for better compression

# For repack operations
git config pack.useBitmaps true
git config pack.writeBitmaps true

# Repack with path-walk optimizations
git repack -a -d -f

# Check improvement
git count-objects -v

# View promisor remote info
git config remote.origin.promisor
git config extensions.partialClone

# Verify promisor packfiles
ls -lah .git/objects/pack/*.promisor

# Clone large monorepo with maximum efficiency
git clone --filter=blob:none --sparse https://github.com/company/monorepo.git
cd monorepo

# Only checkout your team's service
git sparse-checkout set --cone services/api

# Fetch needed objects with path-walk optimization
git backfill --sparse

# Result: 95% smaller than full clone, 70% faster download

# .github/workflows/ci.yml
jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout with optimizations
        run: |
          git clone --filter=blob:none --depth=1 --sparse ${{ github.repositoryUrl }}
          cd repo
          git sparse-checkout set src tests
          git backfill --sparse

      - name: Run tests
        run: npm test
# 80% faster than full clone in CI

# Clone repository with massive history
git clone --filter=blob:none https://github.com/project/with-long-history.git
cd with-long-history

# Work on recent code only (objects fetched on demand)
git checkout -b feature/new-feature

# When you need full history
git backfill

# Repack for optimal storage
git repack -a -d -f  # Uses path-walk API

# If you have old-style remotes, convert them
# Check for deprecated directories
ls -la .git/branches .git/remotes 2>/dev/null

# Use modern remote configuration
git remote add origin https://github.com/user/repo.git
git config remote.origin.fetch '+refs/heads/*:refs/remotes/origin/*'

# ~/.netrc
machine github.com
  login your-username
  password your-token

# Git will now use these credentials automatically
git clone https://github.com/private/repo.git

# Verify Git version
git --version  # Must be 2.49+

# Update Git
brew upgrade git  # macOS
apt update && apt install git  # Ubuntu

# Reset promisor configuration
git config --unset extensions.partialClone
git config --unset remote.origin.promisor

# Re-enable
git config extensions.partialClone origin
git config remote.origin.promisor true

# Force repack with path-walk optimization
git repack -a -d -f --depth=250 --window=250