$ git clone -n https://src.fedoraproject.org/rpms/office-runner.git /var/lib/mock/f45-build-20846-574/root/chroot_tmpdir/scmroot/office-runner
Cloning into '/var/lib/mock/f45-build-20846-574/root/chroot_tmpdir/scmroot/office-runner'...
$ git fetch origin 686fd8e83dfd7527f33ac235fa8f864e42586dad:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/office-runner
 * [new ref]         686fd8e83dfd7527f33ac235fa8f864e42586dad -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 686fd8e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild