Re: [PATCH] Extend "checkout --track" DWIM to support more cases

quoted

No. It strips refs/ OR remotes/ (because of prefixcmp with argv[0]).
And I still wanted refs/<namespace>/something...

Yes, you are correct.  However, to fix my thinko, I deem this preferable:

-- snipsnap --

 builtin-checkout.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/builtin-checkout.c b/builtin-checkout.c
index e95eab9..2a076cf 100644
--- a/builtin-checkout.c
+++ b/builtin-checkout.c

@@ -448,8 +448,10 @@ int cmd_checkout(int argc, const char **argv, const char *prefix)
 		if (!argc || !strcmp(argv[0], "--"))
 			die ("--track needs a branch name");
 		slash = strchr(argv[0], '/');
-		if (slash && !prefixcmp(argv[0], "refs/"))
-			slash = strchr(slash + 1, '/');
+		if (slash && !prefixcmp(argv[0], "refs/")) {
+			argv[0] = slash + 1;
+			slash = strchr(argv[0], '/');
+		}