I've created a test project: https://gitlab-test.wmcloud.org/kostajh/mediawiki-extensions-GrowthExperiments
I'm prompted to add this URL for the remote: git remote add origin git@gitlab.gitlab-test.wmcloud.org:kostajh/mediawiki-extensions-GrowthExperiments.git
When I try to push, I get:
Pushing to gitlab.gitlab-test.wmcloud.org:kostajh/mediawiki-extensions-GrowthExperiments.git ssh: Could not resolve hostname gitlab.gitlab-test.wmcloud.org: Name or service not known fatal: Could not read from remote repository. Please make sure you have the correct access rights and the repository exists.