$ git clone -n https://src.fedoraproject.org/rpms/kf6-knewstuff.git /var/lib/mock/f40-build-2333436-59224/root/chroot_tmpdir/scmroot/kf6-knewstuff
Cloning into '/var/lib/mock/f40-build-2333436-59224/root/chroot_tmpdir/scmroot/kf6-knewstuff'...
$ git fetch origin c76d895b9c8ee2f09578a3084840f993dbaa209f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf6-knewstuff
 * [new ref]         c76d895b9c8ee2f09578a3084840f993dbaa209f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c76d895 replace LicenseRef-KDE-Accepted-* licenses