$ git clone -n https://gitee.com/mgb01105731/libpng.git /var/lib/mock/dist-an23-build-132050-46658/root/chroot_tmpdir/scmroot/libpng
Cloning into '/var/lib/mock/dist-an23-build-132050-46658/root/chroot_tmpdir/scmroot/libpng'...
$ git reset --hard origin/a23
HEAD is now at e3b40c2 add doc package