cg init
echo abc > a.file
cg add a.file
cg commit -m 'added a.file'
cg tag tag_1
echo def >> a.file
cg commit -m 'modified a.file'
git checkout -b branch_1 tag_1
echo ghi > b.file
cg add b.file
cg commit -m 'added b.file'
cg merge -c master
cg commit -m 'merged with master'
gitk --all

exit