[Debian Wiki] Trivial Update of "BOINC/Development/GitUsage" by SteffenMoeller

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The following page has been changed by SteffenMoeller:
http://wiki.debian.org/BOINC/Development/GitUsage

The comment on the change is:
Added some verbosity to the instructions for git newbees, Frank please check.

------------------------------------------------------------------------------
  {{{
  git checkout -b pristine-tar origin/pristine-tar
  }}}
+ As a clarification to those new to git, when cloning, the 
+ source of our clone is referred to as "origin". The "checkout"
+ when given the "-b" option creates a new branch, which happens
+ to have the same as the branch on the git server. The new branch
+ will then be listed next to the previously cloned master branch:
+ {{{
+ git branch
+ }}}
  
  Now to regenerate for example the `boinc_6.2.18.orig.tar.gz` tarball from the `boinc` repository run:
  {{{
  pristine-tar checkout boinc_6.2.18.orig.tar.gz
  }}}
+ ''Frank, please add some words on what is actually happening here.''
  
  To find out which tarballs can be regenerated with `pristine-tar` run:
  {{{
  git ls-tree pristine-tar
+ }}}
+ 
+ To switch back to the master branch, we now check out our own local master branch:
+ {{{
+ git checkout master
  }}}
  
  [[Anchor(BuildingPackages)]]