$ git clone -n https://src.fedoraproject.org/rpms/libva.git /var/lib/mock/f45-build-17199-497/root/chroot_tmpdir/scmroot/libva
Cloning into '/var/lib/mock/f45-build-17199-497/root/chroot_tmpdir/scmroot/libva'...
$ git fetch origin 3f81c404ece45bdfe1b4080c626db22cef077352:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libva
 * [new ref]         3f81c404ece45bdfe1b4080c626db22cef077352 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3f81c40 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild