$ git clone -n https://gitee.com/opencloudos-stream/re2c.git /var/lib/mock/dist-ocs23-build-116381-8061/root/chroot_tmpdir/scmroot/re2c
Cloning into '/var/lib/mock/dist-ocs23-build-116381-8061/root/chroot_tmpdir/scmroot/re2c'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/re2c
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c5ce529 !1 【自动升级】re2c 3.1 Merge pull request !1 from ocs-bot/master