$ git clone -n https://gitee.com/ocs-upgrade/libtommath.git /var/lib/mock/dist-ocs23-build-285020-27555/root/chroot_tmpdir/scmroot/libtommath
Cloning into '/var/lib/mock/dist-ocs23-build-285020-27555/root/chroot_tmpdir/scmroot/libtommath'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/ocs-upgrade/libtommath
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f2fa509 Upgrade to version 1.3.0