$ git clone -n https://gitee.com/src-opencloudos-rpms/libev.git /var/lib/mock/dist-oc9-build-126318-76016/root/chroot_tmpdir/scmroot/libev
Cloning into '/var/lib/mock/dist-oc9-build-126318-76016/root/chroot_tmpdir/scmroot/libev'...
$ git fetch origin 2f3b3a959e19aac23f418fad6e065d197efca066:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/libev
 * [new ref]         2f3b3a959e19aac23f418fad6e065d197efca066 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2f3b3a9 import libev-4.33-8.tl4