The official CMake Git repository was moved in 2017 from https://cmake.org/cmake.git to https://gitlab.kitware.com/cmake/cmake.git as part of the transition to development on GitLab. The old repository was left as a mirror to keep existing scripts in the wild working. We now plan to turn off Git clone/fetch access to the old repository.
Any scripts or checkouts using URLs like
git://cmake.org/cmake.githttp://cmake.org/cmake.githttps://cmake.org/cmake.git
or
git://public.kitware.com/cmake.githttp://public.kitware.com/cmake.githttps://public.kitware.com/cmake.git
should be updated to use the current official repository URL:
https://gitlab.kitware.com/cmake/cmake.git
The old URLs will stop working for git clone, git fetch, and git pull in April 2020.
The gitweb viewer will remain available for a while longer to keep existing links to old commits working, though no new commits will be added.