$ git clone -n https://gitee.com/src-anolis-os/perl-Math-BigInt-FastCalc.git /var/lib/mock/dist-an23-loongarch-build-310308-66339/root/chroot_tmpdir/scmroot/perl-Math-BigInt-FastCalc
Cloning into '/var/lib/mock/dist-an23-loongarch-build-310308-66339/root/chroot_tmpdir/scmroot/perl-Math-BigInt-FastCalc'...
$ git fetch origin a23:KOJI_FETCH_HEAD
From https://gitee.com/src-anolis-os/perl-Math-BigInt-FastCalc
 * [new branch]      a23        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f83fac7 optimize spec