$ git clone -n https://src.fedoraproject.org/rpms/kf6-qqc2-desktop-style.git /var/lib/mock/f40-build-788151-135049/root/chroot_tmpdir/scmroot/kf6-qqc2-desktop-style
Cloning into '/var/lib/mock/f40-build-788151-135049/root/chroot_tmpdir/scmroot/kf6-qqc2-desktop-style'...
$ git fetch origin 8402356f04cce42ca9f9ab1e6cdcefc5e50a3db2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-qqc2-desktop-style
 * [new ref]         8402356f04cce42ca9f9ab1e6cdcefc5e50a3db2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8402356 6.0.0