nforge4 설치시 routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed while accessing

mwtech(playok):/home/playok/nforge4/play-2.1.0> git clone https://github.com/nforge/nforge4.git

Cloning into nforge4...

error: SSL certificate problem, verify that the CA cert is OK. Details:

error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed while accessing https://github.com/nforge/nforge4.git/info/refs

fatal: HTTP request failed

mwtech(playok):/home/playok/nforge4/play-2.1.0> 

mwtech(playok):/home/playok/nforge4/play-2.1.0> env GIT_SSL_NO_VERIFY=true git clone https://github.com/nforge/nforge4.git

Cloning into nforge4...

remote: Counting objects: 11306, done.

remote: Compressing objects: 100% (3212/3212), done.

remote: Total 11306 (delta 8358), reused 10900 (delta 7953)

Receiving objects: 100% (11306/11306), 3.39 MiB | 605 KiB/s, done.

아래 커맨드로 설치~

env GIT_SSL_NO_VERIFY=true git clone https://github.com/nforge/nforge4.git