$ git clone -n https://gitee.com/fundawang/libgit2.git /var/lib/mock/dist-an23-build-353695-71027/root/chroot_tmpdir/scmroot/libgit2
Cloning into '/var/lib/mock/dist-an23-build-353695-71027/root/chroot_tmpdir/scmroot/libgit2'...
$ git fetch origin 189aa8e59e9f18d4f8945ab755bc0ca6fe63c5a4:KOJI_FETCH_HEAD
From https://gitee.com/fundawang/libgit2
 * [new ref]         189aa8e59e9f18d4f8945ab755bc0ca6fe63c5a4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 189aa8e 1.6.5