$ git clone -n https://src.fedoraproject.org/rpms/python-ipywidgets.git /var/lib/mock/f40-build-2717350-72757/root/chroot_tmpdir/scmroot/python-ipywidgets
Cloning into '/var/lib/mock/f40-build-2717350-72757/root/chroot_tmpdir/scmroot/python-ipywidgets'...
$ git fetch origin 2f36c5e4f04522f6b0d80d4559921d49d81c95bd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-ipywidgets
 * [new ref]         2f36c5e4f04522f6b0d80d4559921d49d81c95bd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2f36c5e Update to 8.1.2 (rhbz#2263381)