git clone reports no error but cannot clone it

Question

When I read pro git again, I wanted to clone according to the code in the book

But what pops up on git bash is like this

That is, cloning into 'grit' is displayed and then disappears
Later, I changed git to https protocol and I can clone it
I found that my github did not add the public key, so I generated the public key and added it to githut again
Then I used the git protocol for clong, but in git Display again in bash

That is, cloning into 'grit' is displayed and then disappears

Answer 1

Since you added the public key, use ssh -T git@github.com to test and analyze it,
similar to the following
http://mqing720.blog.163.com/blog/static/2822000020152157483265/

Answer 2

The address structures of the two protocols are different
https is https://github.com/schacon/grit.git
git is git://github.com:schacon/grit.git