$ GIT_CURL_VERBOSE=1 GIT_TRACE=1 git clone https://git.kolab.org/diffusion/RPK/roundcubemail-plugins-kolab.git
10:09:52.977075 git.c:348               trace: built-in: git 'clone' 'https://git.kolab.org/diffusion/RPK/roundcubemail-plugins-kolab.git'
Cloning into 'roundcubemail-plugins-kolab'...
10:09:53.180250 run-command.c:347       trace: run_command: 'git-remote-https' 'origin' 'https://git.kolab.org/diffusion/RPK/roundcubemail-plugins-kolab.git'
* Couldn't find host git.kolab.org in the .netrc file; using defaults
*   Trying 95.128.36.55...
* Connected to git.kolab.org (95.128.36.55) port 443 (#0)
* Initializing NSS with certpath: sql:/etc/pki/nssdb
*   CAfile: /etc/pki/tls/certs/ca-bundle.crt
  CApath: none
* SSL connection using TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
* Server certificate:
* 	subject: CN=*.kolab.org,OU=PositiveSSL Wildcard,OU=Domain Control Validated
* 	start date: Sep 10 00:00:00 2012 GMT
* 	expire date: Sep 09 23:59:59 2017 GMT
* 	common name: *.kolab.org
* 	issuer: CN=COMODO RSA Domain Validation Secure Server CA,O=COMODO CA Limited,L=Salford,ST=Greater Manchester,C=GB
> GET /diffusion/RPK/roundcubemail-plugins-kolab.git/info/refs?service=git-upload-pack HTTP/1.1
User-Agent: git/2.4.3
Host: git.kolab.org
Accept: */*
Accept-Encoding: gzip
Accept-Language: en-US, *;q=0.9
Pragma: no-cache

< HTTP/1.1 200 OK
< Date: Thu, 04 Feb 2016 09:09:53 GMT
< Server: Apache
< X-Frame-Options: SAMEORIGIN
< Strict-Transport-Security: max-age=63072000; includeSubDomains
< X-Frame-Options: Deny
< Strict-Transport-Security: max-age=0; includeSubdomains; preload
< Expires: Fri, 01 Jan 1980 00:00:00 GMT
< Pragma: no-cache
< Cache-Control: no-cache, max-age=0, must-revalidate
< Connection: close
< Transfer-Encoding: chunked
< Content-Type: application/x-git-upload-pack-advertisement
< 
* Closing connection 0
10:09:53.532399 run-command.c:347       trace: run_command: 'fetch-pack' '--stateless-rpc' '--stdin' '--lock-pack' '--thin' '--check-self-contained-and-connected' '--cloning' 'https://git.kolab.org/diffusion/RPK/roundcubemail-plugins-kolab.git/'
10:09:53.532718 exec_cmd.c:128          trace: exec: 'git' 'fetch-pack' '--stateless-rpc' '--stdin' '--lock-pack' '--thin' '--check-self-contained-and-connected' '--cloning' 'https://git.kolab.org/diffusion/RPK/roundcubemail-plugins-kolab.git/'
10:09:53.533460 git.c:348               trace: built-in: git 'fetch-pack' '--stateless-rpc' '--stdin' '--lock-pack' '--thin' '--check-self-contained-and-connected' '--cloning' 'https://git.kolab.org/diffusion/RPK/roundcubemail-plugins-kolab.git/'
* Couldn't find host git.kolab.org in the .netrc file; using defaults
* Hostname git.kolab.org was found in DNS cache
*   Trying 95.128.36.55...
* Connected to git.kolab.org (95.128.36.55) port 443 (#1)
*   CAfile: /etc/pki/tls/certs/ca-bundle.crt
  CApath: none
* SSL connection using TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
* Server certificate:
* 	subject: CN=*.kolab.org,OU=PositiveSSL Wildcard,OU=Domain Control Validated
* 	start date: Sep 10 00:00:00 2012 GMT
* 	expire date: Sep 09 23:59:59 2017 GMT
* 	common name: *.kolab.org
* 	issuer: CN=COMODO RSA Domain Validation Secure Server CA,O=COMODO CA Limited,L=Salford,ST=Greater Manchester,C=GB
> POST /diffusion/RPK/roundcubemail-plugins-kolab.git/git-upload-pack HTTP/1.1
User-Agent: git/2.4.3
Host: git.kolab.org
Accept-Encoding: gzip
Content-Type: application/x-git-upload-pack-request
Accept: application/x-git-upload-pack-result
Content-Encoding: gzip
Content-Length: 1406

* upload completely sent off: 1406 out of 1406 bytes
< HTTP/1.1 200 OK
< Date: Thu, 04 Feb 2016 09:09:53 GMT
< Server: Apache
< X-Frame-Options: SAMEORIGIN
< Strict-Transport-Security: max-age=63072000; includeSubDomains
< X-Frame-Options: Deny
< Strict-Transport-Security: max-age=0; includeSubdomains; preload
< Expires: Fri, 01 Jan 1980 00:00:00 GMT
< Pragma: no-cache
< Cache-Control: no-cache, max-age=0, must-revalidate
< Content-Length: 0
< Connection: close
< Content-Type: application/x-git-upload-pack-result
< 
* Closing connection 1
^C