$ whoami
root
$ git clone -n http://8.131.229.236/anolis-os/libtalloc /var/lib/mock/dist-el8-build-2068-27/root/chroot_tmpdir/scmroot/libtalloc
Cloning into '/var/lib/mock/dist-el8-build-2068-27/root/chroot_tmpdir/scmroot/libtalloc'...
$ git reset --hard origin/a8
HEAD is now at 810e375 import libtalloc-2.2.0-7.el8.src.rpm