$ git clone -n https://gitee.com/src-opencloudos-rpms/libevent.git /var/lib/mock/dist-oc9-build-247830-83629/root/chroot_tmpdir/scmroot/libevent
Cloning into '/var/lib/mock/dist-oc9-build-247830-83629/root/chroot_tmpdir/scmroot/libevent'...
$ git fetch origin 12ebbcff5ffb82f726e3dce03909dfb42305614c:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/libevent
 * [new ref]         12ebbcff5ffb82f726e3dce03909dfb42305614c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 12ebbcf import libevent-2.1.12-7.tl4