Bitbucket in Russia fell innocent victim of random wars the russian government is waging in Internet. The connection to Bitbucket was worsening for months and is nearly broken now. I’ve found the currently working solution here (in Russian). It boils down to editing /etc/hosts file, for example
sudo -i nano /etc/hosts
adding the line
104.192.143.1 bitbucket.org
and rebooting.
It worked for me, but I am thinking now of making backup repository on Github.
The Programming Works 