$ git clone -n https://gitee.com/wenyuzifang/sdl12-compat.git /var/lib/mock/dist-an23-build-481846-74252/root/chroot_tmpdir/scmroot/sdl12-compat
Cloning into '/var/lib/mock/dist-an23-build-481846-74252/root/chroot_tmpdir/scmroot/sdl12-compat'...
$ git fetch origin b15645e042581e0186c6f50ab98469f634398158:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/sdl12-compat
 * [new ref]         b15645e042581e0186c6f50ab98469f634398158 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b15645e Update code from upstream