$ git clone -n https://src.fedoraproject.org/rpms/qt6ct.git /var/lib/mock/f39-build-1664469-40714/root/chroot_tmpdir/scmroot/qt6ct
Cloning into '/var/lib/mock/f39-build-1664469-40714/root/chroot_tmpdir/scmroot/qt6ct'...
$ git fetch origin 377ac208f9bf1e19eb765c9052f2f705d33febb5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6ct
 * [new ref]         377ac208f9bf1e19eb765c9052f2f705d33febb5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 377ac20 Rebuild (qt6)