$ git clone -n https://src.fedoraproject.org/rpms/cmake.git /var/lib/mock/f42-build-3348055-45005/root/chroot_tmpdir/scmroot/cmake
Cloning into '/var/lib/mock/f42-build-3348055-45005/root/chroot_tmpdir/scmroot/cmake'...
$ git fetch origin 66fb93f9767d0f8285b821e9f2d278f66b63b53e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cmake
 * [new ref]         66fb93f9767d0f8285b821e9f2d278f66b63b53e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 66fb93f Define CMAKE_POLICY_VERSION_MINIMUM in %cmake