In t4207 we set up a set of replace objects via git-replace(1). Because
these references should not be impacting subsequent tests we also set up
some cleanup logic that deletes the replacement references via a call to
`rm -rf`. This reaches into the internal implementation details of the
reference backend and will thus break when we grow an alternative refdb
implementation.

Refactor the tests to delete the replacement refs via Git commands so
that we become independent of the actual refdb that's in use. As we
don't have a nice way to delete all replacements or all references in a
certain namespace, we opt for a combination of git-for-each-ref(1) and
git-update-ref(1)'s `--stdin` mode.

Signed-off-by: Patrick Steinhardt <redacted>
---
 t/t4207-log-decoration-colors.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/t/t4207-log-decoration-colors.sh b/t/t4207-log-decoration-colors.sh
index 21986a866df..d138e513a04 100755
--- a/t/t4207-log-decoration-colors.sh
+++ b/t/t4207-log-decoration-colors.sh

@@ -71,7 +71,7 @@ ${c_tag}tag: ${c_reset}${c_tag}A${c_reset}${c_commit})${c_reset} A
 '
 
 test_expect_success 'test coloring with replace-objects' '
-	test_when_finished rm -rf .git/refs/replace* &&
+	test_when_finished "git for-each-ref refs/replace*/** --format=${SQ}delete %(refname)${SQ} | git update-ref --stdin" &&
 	test_commit C &&
 	test_commit D &&
 

@@ -99,7 +99,7 @@ EOF
 '
 
 test_expect_success 'test coloring with grafted commit' '
-	test_when_finished rm -rf .git/refs/replace* &&
+	test_when_finished "git for-each-ref refs/replace*/** --format=${SQ}delete %(refname)${SQ} | git update-ref --stdin" &&
 
 	git replace --graft HEAD HEAD~2 &&
 

-- 
2.42.0