Edit tag messages and preserving original date

edit_tags.sh

for tag in $(git tag -l);do
  # Checkout this tag
  git co $tag > /dev/null
  # Retrieve tag date
  GIT_COMMITTER_DATE=$(git sh $tag | head -n 3 | tail -n 1 | cut -c 9-);
  echo "$tag: $GIT_COMMITTER_DATE"
  # Edit tag message but preserving date (TODO: author?)
  GIT_COMMITTER_DATE="$GIT_COMMITTER_DATE" git tag $tag -a --force
done

# Overwrite remote tags with:
#git push --force --tags