$ git clone -n https://src.fedoraproject.org/rpms/kweathercore.git /var/lib/mock/f40-build-2146855-50889/root/chroot_tmpdir/scmroot/kweathercore
Cloning into '/var/lib/mock/f40-build-2146855-50889/root/chroot_tmpdir/scmroot/kweathercore'...
$ git fetch origin de31c8ad78e9f0f9bb5bf993b2834877bb8c57eb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kweathercore
 * [new ref]         de31c8ad78e9f0f9bb5bf993b2834877bb8c57eb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at de31c8a 0.8.0