git HTTP request failed 问题

##### 问题表象

```

git clone ....

error:  while accessing https://github.com/ahmednawras/log4erl.git/info/refs

fatal: HTTP request failed

```

##### 排查过程

##### 1.打开curl日志

```

export GIT_CURL_VERBOSE=1

git clone https://github.com/ahmednawras/log4erl.git

Initialized empty Git repository in /home/sgame/log4erl/.git/

* Couldn't find host github.com in the .netrc file; using defaults

* About to connect() to github.com port 443 (#0)

*  Trying 192.30.255.113... * Connected to github.com (192.30.255.113) port 443 (#0)

* Initializing NSS with certpath: sql:/etc/pki/nssdb

*  CAfile: /etc/pki/tls/certs/ca-bundle.crt

  CApath: none

* NSS error -12190

* Expire cleared

* Closing connection #0

* Couldn't find host github.com in the .netrc file; using defaults

* About to connect() to github.com port 443 (#0)

*  Trying 192.30.255.113... * Connected to github.com (192.30.255.113) port 443 (#0)

*  CAfile: /etc/pki/tls/certs/ca-bundle.crt

  CApath: none

* NSS error -12190

* Expire cleared

* Closing connection #0

error:  while accessing https://github.com/ahmednawras/log4erl.git/info/refs

fatal: HTTP request failed

```

##### 发现问题

看上面的日志，是NSS的问题

##### 问题解决

尝试更新nss

```

yum update nss nss-util nspr

yum update curl

```