$ git clone -n https://gitee.com/src-opencloudos-rpms/libevent.git /var/lib/mock/dist-oc8-build-249744-83897/root/chroot_tmpdir/scmroot/libevent
Cloning into '/var/lib/mock/dist-oc8-build-249744-83897/root/chroot_tmpdir/scmroot/libevent'...
$ git fetch origin 3bf91e1d5d858697dd278656befa1e11261b60ee:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/libevent
 * [new ref]         3bf91e1d5d858697dd278656befa1e11261b60ee -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3bf91e1 import libevent-2.1.8-11.tl3