参考：
mini:~ hoge$ mkdir tmp mini:~ hoge$ cd tmp mini:~/tmp hoge$ git clone https://github.com/riocampos/Spoon-Knife.git Cloning into 'Spoon-Knife'... Username for 'https://github.com': riocampos Password for 'https://riocampos@github.com': fatal: https://github.com/riocampos/Spoon-Knife.git/info/refs not found: did you run git update-server-info on the server?
あ、先にWeb画面でforkしなきゃいけなかったのか（当たり前）。
これで自分の所にforkできたみたい。
mini:~/tmp hoge$ git clone https://github.com/riocampos/Spoon-Knife.git Cloning into 'Spoon-Knife'... remote: Counting objects: 24, done. remote: Compressing objects: 100% (19/19), done. remote: Total 24 (delta 7), reused 17 (delta 3) Unpacking objects: 100% (24/24), done. mini:~/tmp hoge$ cd Spoon-Knife/ mini:~/tmp/Spoon-Knife hoge$ git remote add upstream https://github.com/octocat/Spoon-Knife.git mini:~/tmp/Spoon-Knife hoge$ git fetch upstream From https://github.com/octocat/Spoon-Knife * [new branch] master -> upstream/master mini:~/tmp/Spoon-Knife hoge$ git push origin master Username for 'https://github.com': riocampos Password for 'https://riocampos@github.com': Everything up-to-date mini:~/tmp/Spoon-Knife hoge$ git fetch upstream mini:~/tmp/Spoon-Knife hoge$ git merge upstream/master Already up-to-date. mini:~/tmp/Spoon-Knife hoge$ git pull upstream You asked to pull from the remote 'upstream', but did not specify a branch. Because this is not the default configured remote for your current branch, you must specify a branch on the command line. mini:~/tmp/Spoon-Knife hoge$ git branch mybranch mini:~/tmp/Spoon-Knife hoge$ git checkout mybranch Switched to branch 'mybranch' mini:~/tmp/Spoon-Knife hoge$ git checkout -b mybranch fatal: A branch named 'mybranch' already exists. mini:~/tmp/Spoon-Knife hoge$ git checkout master Switched to branch 'master' mini:~/tmp/Spoon-Knife hoge$ git checkout mybranch Switched to branch 'mybranch' mini:~/tmp/Spoon-Knife hoge$ nano README mini:~/tmp/Spoon-Knife hoge$ git commit -a -m 'testtest' [mybranch cef34ee] testtest 1 file changed, 3 insertions(+), 1 deletion(-) mini:~/tmp/Spoon-Knife hoge$ git checkout master Switched to branch 'master' mini:~/tmp/Spoon-Knife hoge$ git merge mybranch Updating bdd3996..cef34ee Fast-forward README | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) mini:~/tmp/Spoon-Knife hoge$ git branch -d mybranch Deleted branch mybranch (was cef34ee). mini:~/tmp/Spoon-Knife hoge$ git status # On branch master # Your branch is ahead of 'origin/master' by 1 commit. # nothing to commit (working directory clean) mini:~/tmp/Spoon-Knife hoge$ git push origin master Username for 'https://github.com': riocampos Password for 'https://riocampos@github.com': Counting objects: 5, done. Delta compression using up to 4 threads. Compressing objects: 100% (2/2), done. Writing objects: 100% (3/3), 345 bytes, done. Total 3 (delta 0), reused 0 (delta 0) To https://github.com/riocampos/Spoon-Knife.git bdd3996..cef34ee master -> master
（また理解してからごにょごにょ書くことにする）
