Gitaly::CommitService: Encoding::UndefinedConversionError: U+C124 from UTF-8 to ASCII-8BIT

https://sentry.gitlap.com/gitlab/gitlabcom/issues/118137/

Encoding::UndefinedConversionError: U+C124 from UTF-8 to ASCII-8BIT
  lib/gitlab/gitaly_client/commit_service.rb:132:in `method_missing'
    request.path = options[:path] if options[:path].present?
  lib/gitlab/gitaly_client/commit_service.rb:132:in `commit_count'
    request.path = options[:path] if options[:path].present?
  lib/gitlab/git/repository.rb:1746:in `count_commits_by_gitaly'
    gitaly_commit_client.commit_count(options[:ref], options)
  lib/gitlab/git/repository.rb:505:in `block in count_commits'
    count_commits_by_gitaly(count_commits_options)
  lib/gitlab/gitaly_client.rb:232:in `block (2 levels) in migrate'
    yield is_enabled
...
(130 additional frame(s) were not displayed)

Encoding::UndefinedConversionError: U+C124 from UTF-8 to ASCII-8BIT