$ git clone -n https://src.fedoraproject.org/rpms/kwin-x11.git /var/lib/mock/f40-build-792579-138446/root/chroot_tmpdir/scmroot/kwin-x11
Cloning into '/var/lib/mock/f40-build-792579-138446/root/chroot_tmpdir/scmroot/kwin-x11'...
$ git fetch origin 0d4a754133bfb4b1a67cc34ba7635d137f38bd13:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kwin-x11
 * [new ref]         0d4a754133bfb4b1a67cc34ba7635d137f38bd13 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0d4a754 Update to 6.0.2.