This is a clone of issue OCPBUGS-5093. The following is the description of the original issue:
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Description of problem:

When users try to deploy an application from git method on dev console it throws warning message for specific public repos `URL is valid but cannot be reached. If this is a private repository, enter a source secret in Advanced Git Options.`. If we ignore the warning and go ahead the build will be successful although the warning message seems to be misleading.

Actual results:
Getting a warning for url while trying to deploy an application from git method on dev console from a public repo

Expected results:
It should show validated