$ git clone -n https://src.fedoraproject.org/rpms/libavif.git /var/lib/mock/f40-build-784873-133654/root/chroot_tmpdir/scmroot/libavif
Cloning into '/var/lib/mock/f40-build-784873-133654/root/chroot_tmpdir/scmroot/libavif'...
$ git fetch origin 0d185a9dfdf5057cbfbf2b10b8ac3f02840cab4b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libavif
 * [new ref]         0d185a9dfdf5057cbfbf2b10b8ac3f02840cab4b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0d185a9 Update to 1.0.4