$ git clone -n https://src.fedoraproject.org/rpms/go-fdo-server.git /var/lib/mock/f45-build-19996-565/root/chroot_tmpdir/scmroot/go-fdo-server
Cloning into '/var/lib/mock/f45-build-19996-565/root/chroot_tmpdir/scmroot/go-fdo-server'...
$ git fetch origin aead8ba1f9a84bfad4d16f980807cf1e7f946f1d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/go-fdo-server
 * [new ref]         aead8ba1f9a84bfad4d16f980807cf1e7f946f1d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aead8ba Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild