$ git clone -n https://src.fedoraproject.org/rpms/qt6-qtdatavis3d.git /var/lib/mock/f40-build-740241-109608/root/chroot_tmpdir/scmroot/qt6-qtdatavis3d
Cloning into '/var/lib/mock/f40-build-740241-109608/root/chroot_tmpdir/scmroot/qt6-qtdatavis3d'...
$ git fetch origin d81c81d5827ebf9873c7d3c8d73aba6fc8d21ac1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-qtdatavis3d
 * [new ref]         d81c81d5827ebf9873c7d3c8d73aba6fc8d21ac1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d81c81d 6.6.0