rm -rf hetmat-bfg*
git clone --mirror git@github.com:greenelab/hetmech.git hetmat-bfg.git
java -jar ~/Downloads/bfg-1.13.0.jar \
  --no-blob-protection \
  --delete-folders "{data,explore}" \
  --delete-files "{*.ipynb,.gitattributes,*.txt,*.tsv,*.bz2,*.xz,*.gz,*.zip}" \
  hetmat-bfg.git
cd hetmat-bfg.git
# Prune empty commits
git filter-branch --commit-filter 'git_commit_non_empty_tree "$@"' HEAD
git reflog expire --expire=now --all && git gc --prune=now --aggressive
cd ..
git clone hetmat-bfg.git hetmat-bfg
cd hetmat-bfg
cat > msg-filter.py << "EOF1"
# Python utility to modify commit message
import sys
import re

text = sys.stdin.read()
pattern = re.compile(r'(?<=[\s(])(#\d+)')

def replacer(match):
    # https://regex101.com/r/CaS5S0/2
    return 'greenelab/hetmech' + match.group(1)

text = pattern.sub(repl=replacer, string=text)
print(text)
EOF1
# https://davidwalsh.name/update-git-commit-messages
git filter-branch --force \
  --msg-filter "python `pwd`/msg-filter.py" \
  master
git remote set-url origin git@github.com:hetio/hetmat.git
git push --force