$ git clone -n https://src.fedoraproject.org/rpms/netdata.git /var/lib/mock/f42-build-866774-174118/root/chroot_tmpdir/scmroot/netdata
Cloning into '/var/lib/mock/f42-build-866774-174118/root/chroot_tmpdir/scmroot/netdata'...
$ git fetch origin b7cfb66f2a5afc3ea03f4e441198d29e93137e0f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/netdata
 * [new ref]         b7cfb66f2a5afc3ea03f4e441198d29e93137e0f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b7cfb66 Update to upstream release 2.1.1