$ git clone -n https://src.fedoraproject.org/rpms/python-nbformat.git /var/lib/mock/f41-build-side-1-2814736-32949/root/chroot_tmpdir/scmroot/python-nbformat
Cloning into '/var/lib/mock/f41-build-side-1-2814736-32949/root/chroot_tmpdir/scmroot/python-nbformat'...
$ git fetch origin 2ec4fa40081eed04c80903fb4c04318f0af12f58:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-nbformat
 * [new ref]         2ec4fa40081eed04c80903fb4c04318f0af12f58 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2ec4fa4 convert license to SPDX