$ git clone -n https://src.fedoraproject.org/rpms/kf6-qqc2-desktop-style.git /var/lib/mock/f42-build-side-1-3586819-46925/root/chroot_tmpdir/scmroot/kf6-qqc2-desktop-style
Cloning into '/var/lib/mock/f42-build-side-1-3586819-46925/root/chroot_tmpdir/scmroot/kf6-qqc2-desktop-style'...
$ git fetch origin 3080cb9463498fba7eb64e1cb5703d77555b6f8e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-qqc2-desktop-style
 * [new ref]         3080cb9463498fba7eb64e1cb5703d77555b6f8e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3080cb9 6.16.0