$ git clone -n https://src.fedoraproject.org/rpms/openbox.git /var/lib/mock/f45-build-20999-577/root/chroot_tmpdir/scmroot/openbox
Cloning into '/var/lib/mock/f45-build-20999-577/root/chroot_tmpdir/scmroot/openbox'...
$ git fetch origin c15289f256fc1a3c524b2cd2e5deb9afdad4908b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/openbox
 * [new ref]         c15289f256fc1a3c524b2cd2e5deb9afdad4908b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c15289f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild