$ git clone -n https://src.fedoraproject.org/rpms/layer-shell-qt.git /var/lib/mock/f41-build-857628-168154/root/chroot_tmpdir/scmroot/layer-shell-qt
Cloning into '/var/lib/mock/f41-build-857628-168154/root/chroot_tmpdir/scmroot/layer-shell-qt'...
$ git fetch origin 92c56f6fb103e58f7f8caa5c914380d18edd0af4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/layer-shell-qt
 * [new ref]         92c56f6fb103e58f7f8caa5c914380d18edd0af4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 92c56f6 6.2.1