$ git clone -n https://src.fedoraproject.org/rpms/google-cpu_features.git /var/lib/mock/f40-build-797459-141351/root/chroot_tmpdir/scmroot/google-cpu_features
Cloning into '/var/lib/mock/f40-build-797459-141351/root/chroot_tmpdir/scmroot/google-cpu_features'...
$ git fetch origin a8f9e875b5e0da220c4d2a754e3d4afb9101b9a4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/google-cpu_features
 * [new ref]         a8f9e875b5e0da220c4d2a754e3d4afb9101b9a4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a8f9e87 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild