[bundler/bundler] build_metadata.rb - fix 'warning: instance variable @git_commit_sha not initialized'
https://github.com/bundler/bundler/commit/37a1eec8c8
[bundler/bundler] build_metadata.rb - fix 'warning: instance variable @git_commit_sha not initialized'
https://github.com/bundler/bundler/commit/37a1eec8c8