$ git clone -n https://src.fedoraproject.org/rpms/qt6-qt3d.git /var/lib/mock/f39-build-1763525-41501/root/chroot_tmpdir/scmroot/qt6-qt3d
Cloning into '/var/lib/mock/f39-build-1763525-41501/root/chroot_tmpdir/scmroot/qt6-qt3d'...
$ git fetch origin f29ba2b92199d14fa9b355e4a0a518fb33070c9e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-qt3d
 * [new ref]         f29ba2b92199d14fa9b355e4a0a518fb33070c9e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f29ba2b 6.6.0