$ git clone -n https://gitee.com/opencloudos-stream/jemalloc.git /var/lib/mock/dist-oc9-epol-build-237566-82431/root/chroot_tmpdir/scmroot/jemalloc
Cloning into '/var/lib/mock/dist-oc9-epol-build-237566-82431/root/chroot_tmpdir/scmroot/jemalloc'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/jemalloc
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 74b3624 !2 strip rpm -O* from CFLAGS then append -O3 Merge pull request !2 from xionghuluo/master