$ git clone -n https://gitee.com/wenyuzifang/vulkan-loader.git /var/lib/mock/dist-an23-build-447674-73363/root/chroot_tmpdir/scmroot/vulkan-loader
Cloning into '/var/lib/mock/dist-an23-build-447674-73363/root/chroot_tmpdir/scmroot/vulkan-loader'...
$ git fetch origin 82e6c5b637f074b78794a06e071a6e1ee3f4ce1b:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/vulkan-loader
 * [new ref]         82e6c5b637f074b78794a06e071a6e1ee3f4ce1b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 82e6c5b Update code from upstream