$ git clone -n https://src.fedoraproject.org/rpms/kwin.git /var/lib/mock/f41-build-side-1-2893956-34620/root/chroot_tmpdir/scmroot/kwin
Cloning into '/var/lib/mock/f41-build-side-1-2893956-34620/root/chroot_tmpdir/scmroot/kwin'...
$ git fetch origin 8d75b641afda060144e2899b3a208aab6961b535:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kwin
 * [new ref]         8d75b641afda060144e2899b3a208aab6961b535 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8d75b64 6.2.0