$ git clone -n http://8.131.229.236/anolis-os/firefox /var/lib/mock/dist-el8-updates-build-16824-2666/root/chroot_tmpdir/scmroot/firefox
Cloning into '/var/lib/mock/dist-el8-updates-build-16824-2666/root/chroot_tmpdir/scmroot/firefox'...
$ git reset --hard origin/a8
Updating files:  49% (33/67)
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Updating files: 100% (67/67)
Updating files: 100% (67/67), done.
HEAD is now at 39402a1 update to firefox-78.9.0-1.el8_2.src.rpm