$ git clone -n https://src.fedoraproject.org/rpms/wgrib.git /var/lib/mock/f40-build-2045167-48779/root/chroot_tmpdir/scmroot/wgrib
Cloning into '/var/lib/mock/f40-build-2045167-48779/root/chroot_tmpdir/scmroot/wgrib'...
$ git fetch origin 14c8f2a36f9e1fbdfb9d2426118fe62a7df8b0bc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/wgrib
 * [new ref]         14c8f2a36f9e1fbdfb9d2426118fe62a7df8b0bc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 14c8f2a Update to 1.8.5