$ git clone -n https://src.fedoraproject.org/rpms/kf5-kxmlgui.git /var/lib/mock/f45-build-14934-465/root/chroot_tmpdir/scmroot/kf5-kxmlgui
Cloning into '/var/lib/mock/f45-build-14934-465/root/chroot_tmpdir/scmroot/kf5-kxmlgui'...
$ git fetch origin 93e3648bd0e75ba4b5f0b04a4367ae402a6640d0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kf5-kxmlgui
 * [new ref]         93e3648bd0e75ba4b5f0b04a4367ae402a6640d0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 93e3648 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild