kde-qt is KDE’s copy of Qt, containing the latest release, plus patches for Qt that haven’t been accepted (yet) by Qt Software.

[edit] Creating the repository

See Getting_Started/Build/KDE4/Prerequisites#Qt.

[edit] Updating

To follow the latest recommended qt, use the master branch. If you downloaded it after october 2009, it should be on master already. If not, run these commands once:

git fetch
git checkout -b master origin/master

now, to update, all you need is

git pull