$ git clone -n https://src.fedoraproject.org/rpms/python-nbformat.git /var/lib/mock/f40-build-2222833-52712/root/chroot_tmpdir/scmroot/python-nbformat
Cloning into '/var/lib/mock/f40-build-2222833-52712/root/chroot_tmpdir/scmroot/python-nbformat'...
$ git fetch origin a3da8bf981e7a119bdfa26baccffbc5aba7563d1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-nbformat
 * [new ref]         a3da8bf981e7a119bdfa26baccffbc5aba7563d1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a3da8bf Update to 5.9.2