$ git clone -n https://src.fedoraproject.org/rpms/qt6-qt3d.git /var/lib/mock/f40-build-786580-134465/root/chroot_tmpdir/scmroot/qt6-qt3d
Cloning into '/var/lib/mock/f40-build-786580-134465/root/chroot_tmpdir/scmroot/qt6-qt3d'...
$ git fetch origin bcb2e9be9f51ad88dfe2440f38dde420343b255c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-qt3d
 * [new ref]         bcb2e9be9f51ad88dfe2440f38dde420343b255c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bcb2e9b 6.6.2