Unable to import git project

In such cases, you can use gitls-remote to check the status of the remote repository.

$gitls-remote http://dev....git
fatal:http://dev....git/info/refs not valid:is this agit repository?

$ git ls-remote https://dev...git
(No reply...)

I wonder if https is related to authentication, but I can't get a reply.

I've looked at the project page that someone else created (http://dev.naver.com/projects/beavertoy/src, etc.), but it would be correct to specify https instead of http.