$ git clone -n https://src.fedoraproject.org/rpms/xorg-x11-xauth.git /var/lib/mock/f45-build-39024-731/root/chroot_tmpdir/scmroot/xorg-x11-xauth
Cloning into '/var/lib/mock/f45-build-39024-731/root/chroot_tmpdir/scmroot/xorg-x11-xauth'...
$ git fetch origin 926c58357d3c0ded3039848c894a3b39e1cff3d0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xorg-x11-xauth
 * [new ref]         926c58357d3c0ded3039848c894a3b39e1cff3d0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 926c583 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild