$ git clone -n https://gitee.com/opencloudos-stream/perl-Math-BigInt-FastCalc.git /var/lib/mock/dist-ocs23-base-build-255178-24615/root/chroot_tmpdir/scmroot/perl-Math-BigInt-FastCalc
Cloning into '/var/lib/mock/dist-ocs23-base-build-255178-24615/root/chroot_tmpdir/scmroot/perl-Math-BigInt-FastCalc'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/perl-Math-BigInt-FastCalc
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b5cb04f Rebuilt for loongarch release