bundle install でエラー ”An error has occurred in git when running ...” - Error ”An error has occurred in git when running ...” Occurred by bundle install

現象 - Phenomenon

$ bundle install
# An error has occurred in git when running `git reset --hard xxx. Cannot complete bundling.

原因 - Cause

install 先の git の参照が壊れているため。 - Because the git reference for install destination was broken.

解決 - Solution

$ rm -rf $HOME/.bundler/cache
$ rm -rf $HOME/.bundler/ruby

その後、bundle install で成功しました。 - After that, bundle install was succeeded!

謝辞 - Acknowledgement

@hsbt さんありがとうございます！ - Thanks for @hsbt-san!