scram p CMSSW CMSSW_8_0_22
cd CMSSW_8_0_22/src
git cms-init
git remote add cmshi https://github.com/CmsHI/cmssw.git
git fetch cmshi
git checkout -b evtsel_8_0_22_v01 remotes/cmshi/evtsel_8_0_22_v01

[modify code]
git add [newfiles if any]
git commit -a -m"files changed or added"
git push cmshi evtsel_8_0_22_v01

git checkout -b evtsel_8_0_22_v02
[modify code]
git commit -a -m"files changed"
git push cmshi evtsel_8_0_22_v02