GitHubへのgit clone/pull/push時にSSL証明書まわりでエラーが出るときの本当に正しい対処法 ref: https://qiita.com/karno/items/5ad5006a4912617d2610

file0.txt

$ git clone https://github.com/karno/Cadena
Cloning into 'Cadena'...
fatal: unable to access 'https://github.com/karno/Cadena/': SSL certificate problem: self signed certificate in certificate chain
exit status 128

file1.txt

$ set GIT_CURL_VERBOSE=1
$ git clone https://github.com/karno/Cadena
Cloning into 'Cadena'...
* Couldn't find host github.com in the _netrc file; using defaults
*   Trying 192.30.255.112...
* TCP_NODELAY set
* Connected to github.com (192.30.255.112) port 443 (#0)
* ALPN, offering http/1.1
* Cipher selection: ALL:!EXPORT:!EXPORT40:!EXPORT56:!aNULL:!LOW:!RC4:@STRENGTH
* successfully set certificate verify locations:
*   CAfile: C:/Program Files/Git/mingw64/ssl/certs/ca-bundle.crt
  CApath: none
* SSL certificate problem: self signed certificate in certificate chain
* Closing connection 0
fatal: unable to access 'https://github.com/karno/Cadena/': SSL certificate problem: self signed certificate in certificate chain
exit status 128

file2.txt

$ openssl s_client -connect www.github.com:443
CONNECTED(00000148)
depth=1 O = AO Kaspersky Lab, CN = Kaspersky Anti-Virus Personal Root Certificate
verify error:num=19:self signed certificate in certificate chain
---
Certificate chain
 0 s:businessCategory = Private Organization, jurisdictionC = US, jurisdictionST = Delaware, serialNumber = 5157550, C = US, ST = California, L = San Francisco, O = "GitHub, Inc.", CN = github.com
   i:O = AO Kaspersky Lab, CN = Kaspersky Anti-Virus Personal Root Certificate
 1 s:O = AO Kaspersky Lab, CN = Kaspersky Anti-Virus Personal Root Certificate
   i:O = AO Kaspersky Lab, CN = Kaspersky Anti-Virus Personal Root Certificate
...以下略...

file3.txt

$ git clone https://github.com/karno/Cadena
Cloning into 'Cadena'...
remote: Enumerating objects: 1727, done.
remote: Total 1727 (delta 0), reused 0 (delta 0), pack-reused 1727 eceiving objects:  97% (1676/1727), 188.01 K
Receiving objects: 100% (1727/1727), 471.64 KiB | 632.00 KiB/s, done.
Resolving deltas: 100% (1314/1314), done.

file4.ini

[http]
   sslVerify = false