$ git clone -n https://src.fedoraproject.org/rpms/qt6-qtquick3d.git /var/lib/mock/f39-build-1741753-41368/root/chroot_tmpdir/scmroot/qt6-qtquick3d
Cloning into '/var/lib/mock/f39-build-1741753-41368/root/chroot_tmpdir/scmroot/qt6-qtquick3d'...
$ git fetch origin b7573af1140365f7186f57022085deca60fe1bcd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-qtquick3d
 * [new ref]         b7573af1140365f7186f57022085deca60fe1bcd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b7573af 6.6.0