fatal: unable to access 'https://github.com/gabelerner/canvg.git/': Peer reports incompatible or unsupported protocol version
This may be the reason to your problem: Discontinue support for weak cryptographic standards
....As a result, GitHub is announcing the immediate deprecation, and eventual disablement, of our use of the following cryptographic standards:
TLSv1/TLSv1.1 - This applies to all HTTPS connections, including web, API, and git connections to https://github.com and https://api.github.com. diffie-hellman-group1-sha1 - This applies to all SSH connections to github.com. diffie-hellman-group14-sha1 - This applies to all SSH connections to github.com. All of the above will be disabled on February 1, 2018.
so you need to upgrade to stronger ciphers.I see that this solution helped othersgithub-unable-to-access-ssl-connect-error
yum update -y nss curl libcurlI hope this helps
fatal: unable to access 'https://github.com/john/git-Training.git/': Peer reports incompatible or unsupported protocol version.
I upgraded to the newest cipher, the fatal error was gone.
[john@doe git-Training]$ sudo yum update -y nss curl libcurl