$ git clone -n https://src.fedoraproject.org/rpms/qt5-qtdatavis3d.git /var/lib/mock/f39-build-1731587-41251/root/chroot_tmpdir/scmroot/qt5-qtdatavis3d
Cloning into '/var/lib/mock/f39-build-1731587-41251/root/chroot_tmpdir/scmroot/qt5-qtdatavis3d'...
$ git fetch origin bb792efa54dca8e547b75f308603455a3a3dbdc5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5-qtdatavis3d
 * [new ref]         bb792efa54dca8e547b75f308603455a3a3dbdc5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bb792ef 5.15.11