$ git clone -n https://gitee.com/opencloudos-stream/perl-Math-BigInt.git /var/lib/mock/dist-ocs23-build-12389-753/root/chroot_tmpdir/scmroot/perl-Math-BigInt
Cloning into '/var/lib/mock/dist-ocs23-build-12389-753/root/chroot_tmpdir/scmroot/perl-Math-BigInt'...
$ git fetch origin HEAD:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/perl-Math-BigInt
 * [new ref]                    -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0511793 !1 Upgrade to upstream version 1.9998.39 Merge pull request !1 from jackxjchen/master