El clon de gps https falla (ssh funciona, ver más abajo):
12:00 jean@laptop:~/tmp$ GIT_CURL_VERBOSE=1 git clone https://gist.github.com/123456.git username
Initialized empty Git repository in /home/jean/tmp/username/.git/
* Couldn't find host gist.github.com in the .netrc file; using defaults
* About to connect() to gist.github.com port 443 (#0)
* Trying 192.30.252.142... * Connected to gist.github.com (192.30.252.142) port 443 (#0)
* found 141 certificates in /etc/ssl/certs/ca-certificates.crt
* server certificate verification OK
* common name: *.github.com (matched)
* server certificate expiration date OK
* server certificate activation date OK
* certificate public key: RSA
* certificate version: #3
* subject: C=US,ST=California,L=San Francisco,O=GitHub\, Inc.,CN=*.github.com
* start date: Mon, 30 Apr 2012 00:00:00 GMT
* expire date: Wed, 09 Jul 2014 12:00:00 GMT
* issuer: C=US,O=DigiCert Inc,OU=www.digicert.com,CN=DigiCert High Assurance CA-3
* compression: NULL
* cipher: ARCFOUR-128
* MAC: SHA1
> GET /123456.git/info/refs?service=git-upload-pack HTTP/1.1
User-Agent: git/1.7.1
Host: gist.github.com
Accept: */*
Pragma: no-cache
< HTTP/1.1 301 Moved Permanently
< Server: GitHub.com
< Date: Fri, 01 Nov 2013 05:00:51 GMT
< Content-Type: text/html
< Content-Length: 178
< Location: https://gist.github.com/gist/123456.git/info/refs?service=git-upload-pack
< Vary: Accept-Encoding
<
* Ignoring the response-body
* Expire cleared
* Connection #0 to host gist.github.com left intact
* Issue another request to this URL: 'https://gist.github.com/gist/123456.git/info/refs?service=git-upload-pack'
* Couldn't find host gist.github.com in the .netrc file; using defaults
* Re-using existing connection! (#0) with host gist.github.com
* Connected to gist.github.com (192.30.252.142) port 443 (#0)
> GET /gist/123456.git/info/refs?service=git-upload-pack HTTP/1.1
User-Agent: git/1.7.1
Host: gist.github.com
Accept: */*
Pragma: no-cache
< HTTP/1.1 200 OK
< Server: GitHub.com
< Date: Fri, 01 Nov 2013 05:00:52 GMT
< Content-Type: application/x-git-upload-pack-advertisement
< Transfer-Encoding: chunked
< Expires: Fri, 01 Jan 1980 00:00:00 GMT
< Pragma: no-cache
< Cache-Control: no-cache, max-age=0, must-revalidate
< Vary: Accept-Encoding
<
* Connection #0 to host gist.github.com left intact
* Couldn't find host gist.github.com in the .netrc file; using defaults
* About to connect() to gist.github.com port 443 (#0)
* Trying 192.30.252.142... * connected
* Connected to gist.github.com (192.30.252.142) port 443 (#0)
* found 141 certificates in /etc/ssl/certs/ca-certificates.crt
* SSL re-using session ID
* server certificate verification OK
* common name: *.github.com (matched)
* server certificate expiration date OK
* server certificate activation date OK
* certificate public key: RSA
* certificate version: #3
* subject: C=US,ST=California,L=San Francisco,O=GitHub\, Inc.,CN=*.github.com
* start date: Mon, 30 Apr 2012 00:00:00 GMT
* expire date: Wed, 09 Jul 2014 12:00:00 GMT
* issuer: C=US,O=DigiCert Inc,OU=www.digicert.com,CN=DigiCert High Assurance CA-3
* compression: NULL
* cipher: ARCFOUR-128
* MAC: SHA1
> POST /123456.git/git-upload-pack HTTP/1.1
User-Agent: git/1.7.1
Host: gist.github.com
Accept-Encoding: deflate, gzip
Content-Type: application/x-git-upload-pack-request
Accept: application/x-git-upload-pack-result
Content-Length: 116
< HTTP/1.1 301 Moved Permanently
< Server: GitHub.com
< Date: Fri, 01 Nov 2013 05:00:53 GMT
< Content-Type: text/html
< Content-Length: 178
< Location: https://gist.github.com/gist/123456.git/git-upload-pack
< Vary: Accept-Encoding
<
* Ignoring the response-body
* Connection #0 to host gist.github.com left intact
* Issue another request to this URL: 'https://gist.github.com/gist/123456.git/git-upload-pack'
* Violate RFC 2616/10.3.2 and switch from POST to GET
* Couldn't find host gist.github.com in the .netrc file; using defaults
* Re-using existing connection! (#0) with host gist.github.com
* Connected to gist.github.com (192.30.252.142) port 443 (#0)
> GET /gist/123456.git/git-upload-pack HTTP/1.1
User-Agent: git/1.7.1
Host: gist.github.com
Accept-Encoding: deflate, gzip
Content-Type: application/x-git-upload-pack-request
Accept: application/x-git-upload-pack-result
* The requested URL returned error: 400
* Closing connection #0
error: RPC failed; result=22, HTTP code = 400
Esto funciona: git clone git@gist.github.com:123456.git
HTTP code = 0
, GitHub está caído, como ayer.