$ git clone -n https://src.fedoraproject.org/rpms/jupyterlab.git /var/lib/mock/f40-build-2505485-61700/root/chroot_tmpdir/scmroot/jupyterlab
Cloning into '/var/lib/mock/f40-build-2505485-61700/root/chroot_tmpdir/scmroot/jupyterlab'...
$ git fetch origin 990bc0c5eb5b0e5418309567dade341a6ff0c9dc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jupyterlab
 * [new ref]         990bc0c5eb5b0e5418309567dade341a6ff0c9dc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 990bc0c Update to 4.1.0 (rhbz#2260673)