git push で reject

git push で以下のエラー。

To /var/git/inpm.git
! [rejected] master -> master (non-fast-forward)
error: failed to push some refs to '/var/git/inpm.git'
To prevent you from losing history, non-fast-forward updates were rejected
Merge the remote changes before pushing again. See the 'Note about
fast-forwards' section of 'git push --help' for details.

エラーメッセージに従って、

$ git push

で解消。