From Fedora Project Wiki

Systemd packaging

Setting up the environment

For sys V packages

Cron job to timer migration

For timer migration create a timers.txt file with the following content.

amavisd-new
apt
arm4
atop
bcfg2
clement
cyrus-imapd
dbmail
denyhosts
dspam
exim
fetch-crl
freeipa
hylafax+
inn
leafnode
ltsp
mailman
mcelog
mdadm
mldonkey
newscache
nsd
opendnssec
openvas-scanner
ovirt-engine
ovirt-node
polipo
sagator
sipwitch
spamassassin
squidGuard
subscription-manager
sysstat
vdsm
vnstat
yum-cron

Then let's git clone the packages from Fedora

while read line           
 do           
   git clone git://pkgs.fedoraproject.org/$line
done < timers.txt

And finally create a separated branch to work on

while read line           
 do
   cd $line;
    git checkout -b systemd-timers;
   cd -
done < timers.txt