$ git clone -n https://src.fedoraproject.org/rpms/python-nbclient.git /var/lib/mock/f41-build-side-1-2814731-32949/root/chroot_tmpdir/scmroot/python-nbclient
Cloning into '/var/lib/mock/f41-build-side-1-2814731-32949/root/chroot_tmpdir/scmroot/python-nbclient'...
$ git fetch origin 5e6eb01e04bdc00f54e094b527a7b1b3a20b45d6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-nbclient
 * [new ref]         5e6eb01e04bdc00f54e094b527a7b1b3a20b45d6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5e6eb01 convert license to SPDX