$ git clone -n https://gitee.com/errata/tigervnc.git /var/lib/mock/dist-an7_9-updates-build-387649-71962/root/chroot_tmpdir/scmroot/tigervnc
Cloning into '/var/lib/mock/dist-an7_9-updates-build-387649-71962/root/chroot_tmpdir/scmroot/tigervnc'...
$ git fetch origin a7:KOJI_FETCH_HEAD
From https://gitee.com/errata/tigervnc
 * [new branch]      a7         -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 60e0a4c fix build error