Format git log output with sed, awk, or the like

If I have output like this (from customized git log)

d1fd022 2011-09-21 17:02:26 -0400       Replace double quotes with single quotes.
7227fe4 2011-09-21 13:57:36 -0400       Add automatic CommandTFlush to mkdir/rm/touch/cd

How could you pipe it through sed, awk or similar to achieve this output?

d1fd022 2011-09-21 17:02       Replace double quotes with single quotes.
7227fe4 2011-09-21 13:57       Add automatic CommandTFlush to mkdir/rm/touch/cd

Here the only difference is that seconds and timezone are cut out from the date. Unfo开发者_开发百科rtunately, git doesn't seem to support custom date formats and I'm not good with the likes of sed, so need some help.

I suggest using cut (POSIX):

[guest@pawel] ~ $ cut -c 1-24,34- foo.txt  
d1fd022 2011-09-21 17:02       Replace double quotes with single quotes.
7227fe4 2011-09-21 13:57       Add automatic CommandTFlush to mkdir/rm/touch/cd

awk version:

awk -F':[0-9][0-9] | ' '{$4=""}1' inputFile

test:

kent$  echo "d1fd022 2011-09-21 17:02:26 -0400       Replace double quotes with single quotes.
7227fe4 2011-09-21 13:57:36 -0400       Add automatic CommandTFlush to mkdir/rm/touch/cd"|awk -F':[0-9][0-9] | ' '{$4=""}1'

d1fd022 2011-09-21 17:02        Replace double quotes with single quotes.
7227fe4 2011-09-21 13:57        Add automatic CommandTFlush to mkdir/rm/touch/cd

sed 's/:[^:]* -[^     ]*//' infile

Fixed (it's not a space, it's a tab).