Cual seria la manera correcta de solucionar este problema o si ha habido alguna actualización de git o que deberia de tener encuenta:

To https://github.com/MyUser/prueba-git.git ! [rejected] master -> master (fetch first) error: failed to push some refs to 'https://github.com/MyUser/prueba-git.git' hint: Updates were rejected because the remote contains work that you do hint: not have locally. This is usually caused by another repository pushing hint: to the same ref. You may want to first integrate the remote changes hint: (e.g., 'git pull ...') before pushing again. hint: See the 'Note about fast-forwards' in 'git push --help' for details.