git clone: fatal: Unable to find remote helper for 'https'

该问题是由 git configure 配置时没有设定 --with-curl --with-expat 造成。

参考：git INSTALL文件：

“libcurl” library is used by git-http-fetch and git-fetch. You might also want the “curl” executable for debugging purposes. If you do not use http:// or https:// repositories, you do not have to have them (use NO_CURL).

“expat” library; git-http-push uses it for remote lock management over DAV. Similar to “curl” above, this is optional (with NO_EXPAT).
CentOS的话，使用yum安装curl开发相关库后：

$ yum install libcurl-devel

重新配置编译git即可。

参考：

http://stackoverflow.com/questions/8329485/git-clone-fatal-unable-to-find-remote-helper-for-https

http://rcmdnk.github.io/blog/2013/07/27/computer-cygwin-git/