$ git clone -n https://src.fedoraproject.org/rpms/python-ipywidgets.git /var/lib/mock/f40-build-2120773-50739/root/chroot_tmpdir/scmroot/python-ipywidgets
Cloning into '/var/lib/mock/f40-build-2120773-50739/root/chroot_tmpdir/scmroot/python-ipywidgets'...
$ git fetch origin 3e3a9c626faade136329053a1104eb14ab60b227:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-ipywidgets
 * [new ref]         3e3a9c626faade136329053a1104eb14ab60b227 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3e3a9c6 Update to 8.1.1 (rhbz#2238692)