$ git clone -n https://gitee.com/lizhao2025/imath.git /var/lib/mock/dist-an23-build-499784-74764/root/chroot_tmpdir/scmroot/imath
Cloning into '/var/lib/mock/dist-an23-build-499784-74764/root/chroot_tmpdir/scmroot/imath'...
$ git fetch origin 5eff647c03c6309096d72779e4e0fcc2bcc3c01a:KOJI_FETCH_HEAD
From https://gitee.com/lizhao2025/imath
 * [new ref]         5eff647c03c6309096d72779e4e0fcc2bcc3c01a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5eff647 Update code from upstream