$ git clone -n https://src.fedoraproject.org/rpms/kf6-knewstuff.git /var/lib/mock/f40-build-2218240-52595/root/chroot_tmpdir/scmroot/kf6-knewstuff
Cloning into '/var/lib/mock/f40-build-2218240-52595/root/chroot_tmpdir/scmroot/kf6-knewstuff'...
$ git fetch origin 4c5de941fba73c1e1da1c565dacf713a19077cd3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-knewstuff
 * [new ref]         4c5de941fba73c1e1da1c565dacf713a19077cd3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4c5de94 add doc package with QCH API Docs