Removes large or troublesome blobs like git-filter-branch does, but faster. And written in Scala
cd git-repo
# https://rtyley.github.io/bfg-repo-cleaner/
wget https://repo1.maven.org/maven2/com/madgag/bfg/1.14.0/bfg-1.14.0.jar
java -jar bfg-1.14.0.jar --strip-blobs-bigger-than 50M