$ git clone -n https://gitee.com/yangcheng1203/webkitgtk-1202.git /var/lib/mock/dist-an23-build-494748-74593/root/chroot_tmpdir/scmroot/webkitgtk-1202
Cloning into '/var/lib/mock/dist-an23-build-494748-74593/root/chroot_tmpdir/scmroot/webkitgtk-1202'...
$ git fetch origin b307807487ae69639c5de9ad6d06b6a5a7bd7954:KOJI_FETCH_HEAD
From https://gitee.com/yangcheng1203/webkitgtk-1202
 * [new ref]         b307807487ae69639c5de9ad6d06b6a5a7bd7954 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b307807 update to 2.50.3