Mnkras was trying to import git@github.com:php/php-src.git as a repository, but it was failing with bad credentials.

This should work, and we provide it as an explicit example of a URI which works.

One possible guess is that we like do not preserve git properly when used in this way.

More broadly, the repository did not surface the credential failure in a reasonable/clear way.

See also T7106 (this being a problem outside the cluster) and T7221 (similar issues in this vein with the root cause).