$ git clone -n https://src.fedoraproject.org/rpms/python-notebook.git /var/lib/mock/f42-build-side-1-3517057-46096/root/chroot_tmpdir/scmroot/python-notebook
Cloning into '/var/lib/mock/f42-build-side-1-3517057-46096/root/chroot_tmpdir/scmroot/python-notebook'...
$ git fetch origin f4740ffc25c6f75f08260f4760a466145562985c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-notebook
 * [new ref]         f4740ffc25c6f75f08260f4760a466145562985c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f4740ff Update to 7.4.1 (rhbz#2361823)