$ git clone -n https://src.fedoraproject.org/rpms/python-nbformat.git /var/lib/mock/f45-build-31709-654/root/chroot_tmpdir/scmroot/python-nbformat
Cloning into '/var/lib/mock/f45-build-31709-654/root/chroot_tmpdir/scmroot/python-nbformat'...
$ git fetch origin 9d96eef0cb8b90bb3c1a227056996a0ac2a98b6b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-nbformat
 * [new ref]         9d96eef0cb8b90bb3c1a227056996a0ac2a98b6b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9d96eef Update to 5.11.1 upstream release