$ git clone -n https://gitee.com/zhangwenlong01/perl-B-COW.git /var/lib/mock/dist-an23-build-504437-74854/root/chroot_tmpdir/scmroot/perl-B-COW
Cloning into '/var/lib/mock/dist-an23-build-504437-74854/root/chroot_tmpdir/scmroot/perl-B-COW'...
$ git fetch origin b4ed65b212c68d69e8bfdb7883960a4cc8285ed4:KOJI_FETCH_HEAD
From https://gitee.com/zhangwenlong01/perl-B-COW
 * [new ref]         b4ed65b212c68d69e8bfdb7883960a4cc8285ed4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b4ed65b rebuild for loongarch64