I created a test private mercurial repository and tried to clone it.
$ git clone gitifyhg::https://bitbucket.org/lrousseau/sandbox
Cloning into 'sandbox'...
abort: http authorization required for https://bitbucket.org/lrousseau/sandbox
Of course the sandbox repo is just a sample repo to show the problem. My real repo is not available on the Internet.
I could not find a way to give a login & password to gitifyhg.
It is possible?