Git maintenance commands

git-maintain.sh

# Remove dangling commits/blobs.
git reflog expire --expire=now --all

# Verify connectivity and validity of the DB objects.
git fsck --full --unreachable

# Cleanup unused branches.
git remote | xargs --no-run-if-empty git remote prune

# Re-pack repository objects.
# @see https://gcc.gnu.org/ml/gcc/2007-12/msg00165.html
git repack -a -d --depth=250 --window=250

# Garbage collection.
git gc --prune=now