$ git clone -n https://gitee.com/fundawang/tigervnc.git /var/lib/mock/dist-an23-build-324270-68542/root/chroot_tmpdir/scmroot/tigervnc
Cloning into '/var/lib/mock/dist-an23-build-324270-68542/root/chroot_tmpdir/scmroot/tigervnc'...
$ git fetch origin 3b427ef2c7029e4ba0238cb37d2d02117396d987:KOJI_FETCH_HEAD
From https://gitee.com/fundawang/tigervnc
 * [new ref]         3b427ef2c7029e4ba0238cb37d2d02117396d987 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3b427ef Rebuild against latests xorg-x11-server