$ git clone -n https://src.fedoraproject.org/rpms/golang-github-racingmars-go3270.git /var/lib/mock/f45-build-12397-442/root/chroot_tmpdir/scmroot/golang-github-racingmars-go3270
Cloning into '/var/lib/mock/f45-build-12397-442/root/chroot_tmpdir/scmroot/golang-github-racingmars-go3270'...
$ git fetch origin e4415ed72a142a7a5be0735b45ae6be96371097c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-racingmars-go3270
 * [new ref]         e4415ed72a142a7a5be0735b45ae6be96371097c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e4415ed Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild