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P4 Server Administration Documentation | 2025.1

# Specify a commit that is a "detached head"

You can sync a commit that is not at the head of any named branch.

1. Find an older tag:

> p4 graph ref-hist -n //hth/mary
> //hth/mary a0ace6d80a34d257e13da1a47d1fab1c1 tag refs/tags/tag77 create helen 2019/01/08 16:35:18

2. Sync to this tag:

> p4 sync a0ace6d80a34d257e13da1a47d1fab1c1

3. Run p4 have

> p4 have
> //depot/projectA/submit_trigger.pl#1 - /opt/perforce/servers/17100/graph_ws/depot/projectA/submit_trigger.pl
> //hth/mary graph_ws f9baf26 DETACHED HEAD

For details about the Git concept of "DETACHED HEAD", see https://git-scm.com/docs/git-checkout.

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