$ git clone -n git+ssh://git@codeup.openanolis.cn/codeup/anolis-os/libpng.git /var/lib/mock/dist-an7-build-31952-15847/root/chroot_tmpdir/scmroot/libpng
Cloning into '/var/lib/mock/dist-an7-build-31952-15847/root/chroot_tmpdir/scmroot/libpng'...
$ git reset --hard origin/a7
HEAD is now at 41d20a4 import libpng-1.5.13-7.el7_2.src.rpm