Why does fetch-pack not works over http?

Dear all,

We're wondering why "fetch-pack" (when is running from the command line) doesn't handle "https://" protocol. It only works with "git://".

For instance, this doesn't work:

$ git fetch-pack https://github.com/git/git refs/heads/master fatal: I don't handle protocol 'https'

while this does:

$ git fetch-pack git://github.com/git/git refs/heads/master

The funny thing is that under the hood, "fetch" calls "fetch-pack" using "https" procotol. Example of a trace below:

12:03:07.512558 git.c:344               trace: built-in: git 'fetch- pack' '--stateless-rpc' '--stdin' '--lock-pack' '--thin' 'https://githu b.com/git/git/'

Cheers