$ git clone -n https://src.fedoraproject.org/rpms/nut.git /var/lib/mock/f40-build-733719-105363/root/chroot_tmpdir/scmroot/nut
Cloning into '/var/lib/mock/f40-build-733719-105363/root/chroot_tmpdir/scmroot/nut'...
$ git fetch origin f9d1f583d7a3ecc02d42da4252c621a13334b4fb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/nut
 * [new ref]         f9d1f583d7a3ecc02d42da4252c621a13334b4fb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f9d1f58 spec cleanup, based on PR#14 by Orion Poplawski