It can be anything! An apex, subdomain, or even a URL.

Results forgitlab.git.git.liumytools.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2024-06-27T14:03:08.548	2024-06-27T13:03:06	2024-09-25T13:03:05	gitlab.git.git.liumytools.com	gitlab.git.git.liumytools.com	C=US, O=Let's Encrypt, CN=R10
2024-06-27T14:03:06.338	2024-06-27T13:03:06	2024-09-25T13:03:05	gitlab.git.git.liumytools.com	gitlab.git.git.liumytools.com	C=US, O=Let's Encrypt, CN=R10
2022-12-01T08:24:12.236	2022-12-01T07:24:11	2023-03-01T07:24:10	gitlab.git.git.liumytools.com	gitlab.git.git.liumytools.com	C=US, O=Let's Encrypt, CN=R3
2022-12-01T08:24:11.943	2022-12-01T07:24:11	2023-03-01T07:24:10	gitlab.git.git.liumytools.com	gitlab.git.git.liumytools.com	C=US, O=Let's Encrypt, CN=R3