$ git clone -n https://gitee.com/gcdota930915/llvm18.git /var/lib/mock/dist-an23.3-build-426021-72983/root/chroot_tmpdir/scmroot/llvm18
Cloning into '/var/lib/mock/dist-an23.3-build-426021-72983/root/chroot_tmpdir/scmroot/llvm18'...
$ git fetch origin 73bfe28ebbdde75eba13e0d1d070e99dacc507cb:KOJI_FETCH_HEAD
From https://gitee.com/gcdota930915/llvm18
 * [new ref]         73bfe28ebbdde75eba13e0d1d070e99dacc507cb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 73bfe28 Enable llvm gold on loongarch64