$ git clone -n https://src.fedoraproject.org/rpms/xfce4-vala.git /var/lib/mock/f45-build-38826-728/root/chroot_tmpdir/scmroot/xfce4-vala
Cloning into '/var/lib/mock/f45-build-38826-728/root/chroot_tmpdir/scmroot/xfce4-vala'...
$ git fetch origin 7462c488556c9ea6ab1261fcc0cef983b2265ab6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xfce4-vala
 * [new ref]         7462c488556c9ea6ab1261fcc0cef983b2265ab6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7462c48 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild