$ git clone -n https://src.fedoraproject.org/rpms/python-notebook.git /var/lib/mock/f40-build-2726902-73126/root/chroot_tmpdir/scmroot/python-notebook
Cloning into '/var/lib/mock/f40-build-2726902-73126/root/chroot_tmpdir/scmroot/python-notebook'...
$ git fetch origin ff056a538f873814e46d9228ed5a7e313ee0b057:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-notebook
 * [new ref]         ff056a538f873814e46d9228ed5a7e313ee0b057 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ff056a5 Update to 7.0.7 (rhbz#2252762)