Git 2.51.0 has deprecated the 'whatchanged' command. The git client plugin for Jenkins still uses the "git whatchanged" command to generate its changelog. I hope to release a replacement soon, but am only starting the implementation now. Mark Waite Message sent as requested by git 2.51.0 'git whatchanged' is nominated for removal. If you still use this command, please add an extra option, '--i-still-use-this', on the command line and let us know you still use it by sending an e-mail to <git@xxxxxxxxxxxxxxx>. Thanks. fatal: refusing to run without --i-still-use-this