$ git clone -n https://gitee.com/src-anolis-os/grub2.git /var/lib/mock/dist-an7_9-updates-build-383433-71920/root/chroot_tmpdir/scmroot/grub2
Cloning into '/var/lib/mock/dist-an7_9-updates-build-383433-71920/root/chroot_tmpdir/scmroot/grub2'...
$ git fetch origin a7:KOJI_FETCH_HEAD
From https://gitee.com/src-anolis-os/grub2
 * [new branch]      a7         -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b0497f4 Update to grub2-2.02-0.87.el7_9.14