$ git clone -n https://gitee.com/fundawang/libtommath.git /var/lib/mock/dist-an23-build-298647-65838/root/chroot_tmpdir/scmroot/libtommath
Cloning into '/var/lib/mock/dist-an23-build-298647-65838/root/chroot_tmpdir/scmroot/libtommath'...
$ git fetch origin eec3e066b8452ce36bf199f1dfce22cfe7934e0d:KOJI_FETCH_HEAD
From https://gitee.com/fundawang/libtommath
 * [new ref]         eec3e066b8452ce36bf199f1dfce22cfe7934e0d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eec3e06 fix CVE-2023-36328