$ git clone -n https://src.fedoraproject.org/rpms/kwin.git /var/lib/mock/f41-build-side-1-3131070-39607/root/chroot_tmpdir/scmroot/kwin
Cloning into '/var/lib/mock/f41-build-side-1-3131070-39607/root/chroot_tmpdir/scmroot/kwin'...
$ git fetch origin addc8cf9db000efa45d80f44d33a7956af69ba3e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kwin
 * [new ref]         addc8cf9db000efa45d80f44d33a7956af69ba3e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at addc8cf Merge branch 'rawhide' into f41