$ git clone -n https://src.fedoraproject.org/rpms/wgrib.git /var/lib/mock/f45-build-38352-723/root/chroot_tmpdir/scmroot/wgrib
Cloning into '/var/lib/mock/f45-build-38352-723/root/chroot_tmpdir/scmroot/wgrib'...
$ git fetch origin dcb428720c57e88bea8b66329b9e5aa6f0966c85:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/wgrib
 * [new ref]         dcb428720c57e88bea8b66329b9e5aa6f0966c85 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dcb4287 Drop x86_32