Merge branch 'pk/test-avoid-pipe-hiding-exit-status'

Test cleanup.

* pk/test-avoid-pipe-hiding-exit-status:
test: avoid pipes in git related commands for test

diff --cc t/t5300-pack-object.sh
Simple merge

diff --cc t/t5510-fetch.sh
Simple merge

diff --cc t/t7003-filter-branch.sh
Simple merge