QtCurve has recently switched hosting locations to the KDE infrastructure.
The new repo URLs are:
read-only: git://anongit.kde.org/qtcurve
read-write: git@git.kde.org:qtcurve
web: https://projects.kde.org/projects/playground/base/qtcurve/repository or http://quickgit.kde.org/?p=qtcurve.git
You can rewrite your existing clonedir/.git/config to use the new URLs (or use the 'git remote ...' family of commands) and continue to use your existing clones.
More at: https://community.kde.org/Sysadmin/GitKdeOrgManual
Merge requests via http://git.reviewboard.kde.org/
Bugs/wishes via http://bugs.kde.org