$ git clone -n https://src.fedoraproject.org/rpms/kwin.git /var/lib/mock/f40-build-2112003-50666/root/chroot_tmpdir/scmroot/kwin
Cloning into '/var/lib/mock/f40-build-2112003-50666/root/chroot_tmpdir/scmroot/kwin'...
$ git fetch origin 2c0fbf556217d70941bcd65cd63c720daae9069b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kwin
 * [new ref]         2c0fbf556217d70941bcd65cd63c720daae9069b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2c0fbf5 5.91.0