$ git clone -n https://src.fedoraproject.org/rpms/python-ipywidgets.git /var/lib/mock/f42-build-side-1-3566335-46733/root/chroot_tmpdir/scmroot/python-ipywidgets
Cloning into '/var/lib/mock/f42-build-side-1-3566335-46733/root/chroot_tmpdir/scmroot/python-ipywidgets'...
$ git fetch origin 967f0d037bea94c874e5c376b2e85aec4d40c53e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-ipywidgets
 * [new ref]         967f0d037bea94c874e5c376b2e85aec4d40c53e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 967f0d0 Make ipywidgets available in jupyter lab