[Kde-scm-interest] kdegames' move to Git

[Chani]

On Sunday, June 27, 2010 10:46:03 am Oswald Buddenhagen wrote:
> On Sun, Jun 27, 2010 at 12:32:42PM -0500, Ian Monroe wrote:
> > On Sun, Jun 27, 2010 at 12:22 PM, Tom Albers <toma at kde.org> wrote:
> > > Moving KMail from kdepim to extragear would not be possible while
> > > preserving the history. This is imho important to know and consider.
> > 
> > I don't think this is true. It's not something you'd want to do
> > everyday, but splicing and dicing git repos is possible.
> 
> it's something you wouldn't ever want to do, as "carving out" a module
> will invalidate all sha1 references. 

why does that matter? (seriously, I don't understand what consequences it 
could have)