$ git clone -n https://gitee.com/src-anolis-os/firefox.git /var/lib/mock/dist-an7-build-62823-34902/root/chroot_tmpdir/scmroot/firefox
Cloning into '/var/lib/mock/dist-an7-build-62823-34902/root/chroot_tmpdir/scmroot/firefox'...
$ git reset --hard origin/a7
Updating files:  97% (38/39)
Updating files: 100% (39/39)
Updating files: 100% (39/39), done.
HEAD is now at d06fbd8 !7 update version to errata Merge pull request !7 from xzyang/a7