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aspmx1.migadu.com; dkim=fail ("headers rsa verify failed") header.d=gmail.com header.s=20210112 header.b="WoR/hKc8"; dmarc=fail reason="SPF not aligned (relaxed)" header.from=gmail.com (policy=none); spf=pass (aspmx1.migadu.com: domain of "bug-guix-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="bug-guix-bounces+larch=yhetil.org@gnu.org" X-Migadu-Spam-Score: -2.70 Authentication-Results: aspmx1.migadu.com; dkim=fail ("headers rsa verify failed") header.d=gmail.com header.s=20210112 header.b="WoR/hKc8"; dmarc=fail reason="SPF not aligned (relaxed)" header.from=gmail.com (policy=none); spf=pass (aspmx1.migadu.com: domain of "bug-guix-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="bug-guix-bounces+larch=yhetil.org@gnu.org" X-Migadu-Queue-Id: EA4AD1B200 X-Spam-Score: -2.70 X-Migadu-Scanner: scn0.migadu.com X-TUID: gMKjkn5MvPkY Hi, Now the repo is becoming large, the short prefix using 6 character can be refer to 2 Git objects. For instance, --8<---------------cut here---------------start------------->8--- $ git show 7022eb6 error: short object ID 7022eb6 is ambiguous hint: The candidates are: hint: 7022eb6ea0 commit 2021-12-07 - gnu: Add notcurses. hint: 7022eb6c9a blob [..] --8<---------------cut here---------------end--------------->8--- The issue is the error report by =E2=80=9Cguix time-machine=E2=80=9D (or gu= ix pull), for instance, --8<---------------cut here---------------start------------->8--- $ guix time-machine --commit=3D7022eb6 -- help guix time-machine: error: Git error: ambiguous SHA1 prefix - found multiple= pack entries --8<---------------cut here---------------end--------------->8--- It could be nice that, when short prefix is ambiguous: 1) try the commit object candidate if only one 2) show a hint for the possible candidates Cheers, simon