$ git clone -n https://src.fedoraproject.org/rpms/openfst.git /var/lib/mock/f45-build-21042-577/root/chroot_tmpdir/scmroot/openfst
Cloning into '/var/lib/mock/f45-build-21042-577/root/chroot_tmpdir/scmroot/openfst'...
$ git fetch origin 6778840e3cd0624a4397a3fb945b03faceb2013b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/openfst
 * [new ref]         6778840e3cd0624a4397a3fb945b03faceb2013b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6778840 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild