How I eventually fixed a corrupted git

corruptGitFix.sh

# All commands start in project root

# Get back corrupted objects
git fetch -p
git unpack-objects < <new clone of remote>/.git/objects/pack/pack-<hash>.pack

#.get rid of empty files if git fsck isn't working or just in general
cd .git; find . -type f -empty -delete -print

# Find problems (anything other than dangling commit/object is a problem)
git fsck