$ git clone -n https://src.fedoraproject.org/rpms/python-jupyter-server.git /var/lib/mock/f40-build-2222699-52711/root/chroot_tmpdir/scmroot/python-jupyter-server
Cloning into '/var/lib/mock/f40-build-2222699-52711/root/chroot_tmpdir/scmroot/python-jupyter-server'...
$ git fetch origin 320d96bda34975cfdae3b5be49601a7a4ee88de3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-jupyter-server
 * [new ref]         320d96bda34975cfdae3b5be49601a7a4ee88de3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 320d96b Update to 2.12.3 (rhbz#2257481)