$ git clone -n https://gitee.com/mgb01105731/libpng.git /var/lib/mock/dist-an23-build-132269-46675/root/chroot_tmpdir/scmroot/libpng
Cloning into '/var/lib/mock/dist-an23-build-132269-46675/root/chroot_tmpdir/scmroot/libpng'...
$ git reset --hard 6d7063e51b15a0fb05a23e3692a3a14d8eaf62a8
HEAD is now at 6d7063e  add doc package