Signed-off-by: Steffen Prohaska <prohaska@zib.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>
commits reachable from some head but not from any tag in the repository:
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-$ gitk ($ git show-ref --heads ) --not $( git show-ref --tags )
+$ gitk $( git show-ref --heads ) --not $( git show-ref --tags )
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(See gitlink:git-rev-parse[1] for explanations of commit-selecting