$ whoami
root
$ git clone -n http://8.131.229.236/anolis-os/libsigc++20 /var/lib/mock/dist-el8-build-3398-28/root/chroot_tmpdir/scmroot/libsigc++20
Cloning into '/var/lib/mock/dist-el8-build-3398-28/root/chroot_tmpdir/scmroot/libsigc++20'...
$ git reset --hard origin/a8
HEAD is now at ca3506c import libsigc++20-2.10.0-5.el8.src.rpm