$ curl -s -v https://api.github.com/repos/dentarg/puma/git/refs/heads/master
*   Trying 140.82.121.6:443...
* Connected to api.github.com (140.82.121.6) port 443 (#0)
* ALPN, offering h2
* ALPN, offering http/1.1
* TLSv1.3 (OUT), TLS handshake, Client hello (1):
* TLSv1.3 (IN), TLS handshake, Server hello (2):
* TLSv1.3 (IN), TLS handshake, Encrypted Extensions (8):
* TLSv1.3 (IN), TLS handshake, Certificate (11):
* TLSv1.3 (IN), TLS handshake, CERT verify (15):
* TLSv1.3 (IN), TLS handshake, Finished (20):
* TLSv1.3 (OUT), TLS change cipher, Change cipher spec (1):
* TLSv1.3 (OUT), TLS handshake, Finished (20):
* SSL connection using TLSv1.3 / TLS_AES_128_GCM_SHA256
* ALPN, server accepted to use h2
* Server certificate:
*  subject: C=US; ST=California; L=San Francisco; O=GitHub, Inc.; CN=*.github.com
*  start date: Mar 25 00:00:00 2021 GMT
*  expire date: Mar 30 23:59:59 2022 GMT
*  subjectAltName: host "api.github.com" matched cert's "*.github.com"
*  issuer: C=US; O=DigiCert, Inc.; CN=DigiCert High Assurance TLS Hybrid ECC SHA256 2020 CA1
*  SSL certificate verify ok.
* Using HTTP2, server supports multi-use
* Connection state changed (HTTP/2 confirmed)
* Copying HTTP/2 data in stream buffer to connection buffer after upgrade: len=0
* Using Stream ID: 1 (easy handle 0x7fe795004a00)
> GET /repos/dentarg/puma/git/refs/heads/master HTTP/2
> Host: api.github.com
> user-agent: curl/7.76.1
> accept: */*
>
* TLSv1.3 (IN), TLS handshake, Newsession Ticket (4):
* TLSv1.3 (IN), TLS handshake, Newsession Ticket (4):
* old SSL session ID is stale, removing
< HTTP/2 200
< server: GitHub.com
< date: Tue, 14 Dec 2021 22:19:23 GMT
< content-type: application/json; charset=utf-8
< cache-control: public, max-age=60, s-maxage=60
< vary: Accept, Accept-Encoding, Accept, X-Requested-With
< etag: W/"f3c2afa80a8c02f3c775783acf72eca88fd4fd84e749319fe2da12ae1dbd0d90"
< last-modified: Mon, 13 Dec 2021 00:05:04 GMT
< x-poll-interval: 300
< x-github-media-type: github.v3; format=json
< access-control-expose-headers: ETag, Link, Location, Retry-After, X-GitHub-OTP, X-RateLimit-Limit, X-RateLimit-Remaining, X-RateLimit-Used, X-RateLimit-Resource, X-RateLimit-Reset, X-OAuth-Scopes, X-Accepted-OAuth-Scopes, X-Poll-Interval, X-GitHub-Media-Type, Deprecation, Sunset
< access-control-allow-origin: *
< strict-transport-security: max-age=31536000; includeSubdomains; preload
< x-frame-options: deny
< x-content-type-options: nosniff
< x-xss-protection: 0
< referrer-policy: origin-when-cross-origin, strict-origin-when-cross-origin
< content-security-policy: default-src 'none'
< x-ratelimit-limit: 60
< x-ratelimit-remaining: 49
< x-ratelimit-reset: 1639523490
< x-ratelimit-resource: core
< x-ratelimit-used: 11
< accept-ranges: bytes
< content-length: 374
< x-github-request-id: EAD2:10CA9:28697AA:2921C9A:61B9186B
<
{
  "ref": "refs/heads/master",
  "node_id": "MDM6UmVmMjA0MTU0MTA0OnJlZnMvaGVhZHMvbWFzdGVy",
  "url": "https://api.github.com/repos/dentarg/puma/git/refs/heads/master",
  "object": {
    "sha": "fa178f3c829610d82b9c5013db748ff0207e5773",
    "type": "commit",
    "url": "https://api.github.com/repos/dentarg/puma/git/commits/fa178f3c829610d82b9c5013db748ff0207e5773"
  }
}
* Connection #0 to host api.github.com left intact