$ git clone -n https://gitee.com/youyiljm/libunwind.git /var/lib/mock/dist-an23-build-506917-74892/root/chroot_tmpdir/scmroot/libunwind
Cloning into '/var/lib/mock/dist-an23-build-506917-74892/root/chroot_tmpdir/scmroot/libunwind'...
$ git fetch origin 3cc5ace6ad7ba768fdde3b885415274669b9c06f:KOJI_FETCH_HEAD
From https://gitee.com/youyiljm/libunwind
 * [new ref]         3cc5ace6ad7ba768fdde3b885415274669b9c06f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3cc5ace support sw_64