```
[] ~/projects/rubygems $ git co v2.7.9
M	bundler
Previous HEAD position was 9c142f5d Bump version to 3.0.6
HEAD is now at a05fe154 Bump version to 2.7.9

[] ~/projects/rubygems $ jruby -I lib -r `pwd`/gem.jar -e "require 'mygem'"

[] ~/projects/rubygems $
```