$ git clone -n https://src.fedoraproject.org/rpms/x3270.git /var/lib/mock/f45-build-38586-725/root/chroot_tmpdir/scmroot/x3270
Cloning into '/var/lib/mock/f45-build-38586-725/root/chroot_tmpdir/scmroot/x3270'...
$ git fetch origin 8c14d61807d8cd7fe21800735a67aa340738ecdf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/x3270
 * [new ref]         8c14d61807d8cd7fe21800735a67aa340738ecdf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8c14d61 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild