$ git clone -n https://gitee.com/zhuzhustu/i2c-tools.git /var/lib/mock/dist-an23-build-525491-78383/root/chroot_tmpdir/scmroot/i2c-tools
Cloning into '/var/lib/mock/dist-an23-build-525491-78383/root/chroot_tmpdir/scmroot/i2c-tools'...
$ git fetch origin b927a3bc3ae46c3f79a434168eb6deff1d53c1f8:KOJI_FETCH_HEAD
From https://gitee.com/zhuzhustu/i2c-tools
 * [new ref]         b927a3bc3ae46c3f79a434168eb6deff1d53c1f8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b927a3b update i2c-tools.spec.