$ git clone -n https://src.fedoraproject.org/rpms/jupyterlab.git /var/lib/mock/f41-build-side-2-python-2734560-30830/root/chroot_tmpdir/scmroot/jupyterlab
Cloning into '/var/lib/mock/f41-build-side-2-python-2734560-30830/root/chroot_tmpdir/scmroot/jupyterlab'...
$ git fetch origin a02781aabc6afdad5ee2a40be9d5f40d4c35e619:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jupyterlab
 * [new ref]         a02781aabc6afdad5ee2a40be9d5f40d4c35e619 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a02781a Update to 4.2.5 (rhbz#2295514)