$ git clone -n https://src.fedoraproject.org/rpms/python-jupyterlab-server.git /var/lib/mock/f40-build-2246350-53808/root/chroot_tmpdir/scmroot/python-jupyterlab-server
Cloning into '/var/lib/mock/f40-build-2246350-53808/root/chroot_tmpdir/scmroot/python-jupyterlab-server'...
$ git fetch origin 85aa66dbef8f8b40478e4f7621e0882172a3bd34:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-jupyterlab-server
 * [new ref]         85aa66dbef8f8b40478e4f7621e0882172a3bd34 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 85aa66d Update to 2.25.2 (rhbz#2238576)