$ git clone -n https://src.fedoraproject.org/rpms/xorg-x11-drv-dummy.git /var/lib/mock/f45-build-39003-731/root/chroot_tmpdir/scmroot/xorg-x11-drv-dummy
Cloning into '/var/lib/mock/f45-build-39003-731/root/chroot_tmpdir/scmroot/xorg-x11-drv-dummy'...
$ git fetch origin e3fcbf3c117774ed8ec715ae1daa92b79613a790:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xorg-x11-drv-dummy
 * [new ref]         e3fcbf3c117774ed8ec715ae1daa92b79613a790 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e3fcbf3 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild