$ git clone -n https://gitee.com/src-opencloudos-rpms/dovecot.git /var/lib/mock/dist-oc8-build-117321-68286/root/chroot_tmpdir/scmroot/dovecot
Cloning into '/var/lib/mock/dist-oc8-build-117321-68286/root/chroot_tmpdir/scmroot/dovecot'...
$ git fetch origin b00a938c1c878a24490acd446dc4f00f1b51ace8:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/dovecot
 * [new ref]         b00a938c1c878a24490acd446dc4f00f1b51ace8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b00a938 import dovecot-2.3.16-6.tl3