$ git clone -n https://src.fedoraproject.org/rpms/qt6-qtquick3dphysics.git /var/lib/mock/f42-build-3403706-45135/root/chroot_tmpdir/scmroot/qt6-qtquick3dphysics
Cloning into '/var/lib/mock/f42-build-3403706-45135/root/chroot_tmpdir/scmroot/qt6-qtquick3dphysics'...
$ git fetch origin b9898001dd7e06333ac9e04a246e2bdf3cc8c1e9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt6-qtquick3dphysics
 * [new ref]         b9898001dd7e06333ac9e04a246e2bdf3cc8c1e9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b989800 6.8.2