$ git clone -n https://src.fedoraproject.org/rpms/ibus-kkc.git /var/lib/mock/f45-build-13976-456/root/chroot_tmpdir/scmroot/ibus-kkc
Cloning into '/var/lib/mock/f45-build-13976-456/root/chroot_tmpdir/scmroot/ibus-kkc'...
$ git fetch origin 171b2b0a9223bcc17b5091d4df9bf59e35916150:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ibus-kkc
 * [new ref]         171b2b0a9223bcc17b5091d4df9bf59e35916150 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 171b2b0 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild