Real life use-case (was: Re: Devel project migrations happening soon)

Hi there, I just had an interesting use case with this: 1. ffmpeg-4 fails to build due to changelog entries out of order 2. osc branch multimedia:libs/ffmpeg-4 -> Failure: package is developed at src.opensuse.org, fork it there 3. Login at src.opensuse.org 4. fork jengelh/ffmpeg-4 5. git clone https://src.opensuse.org/manfred-h/ffmpeg-4 6. vi ffmpeg-4.changes 7. git commit -a 8. git push -> An authentication box pops up into which I enter my OBS credentials FAILURE: Authentication at src.opensuse.org failed. I then ended up to upload my changed file in the browser and created a pull request there. Where can I find documentation which explains how I can authenticate successfully at cli, i.e. "git push"? TIA, cheers. l8er manfred