Something

git init

#import
git remote add origin ssh://git.debian.org/git/collab-maint/pkg-retty
git config branch.master.merge refs/heads/master
git remote add upstream-repo http://pasky.or.cz/\~pasky/dev/retty/retty.git/
git config remote.upstream-repo.fetch +refs/heads/master:refs/remotes/upstream-repo/upstream
git fetch upstream-repo
git checkout -b upstream upstream-repo/upstream  # this will throw an error
git branch

# erster commit
git tag -s retty-1.0-1 4bf4348
git checkout -b master retty-1.0-1
zcat ~/work/MISC/retty/retty_1.0-1.diff.gz | git apply  # returns with 'error: blindtty.1: already exists in working directory'

#build
git checkout -b build retty-1.0-1
../poor-mans-gitbuild.sh