It's used at build time in 8 crates.

Depender (with downloads and own rev deps) vergen-git2 version
7.2K wallust build ^1.0
440 gerust build ^1.0.1
350 rainfrog build ^1.0.0
240 termscp build ^1
130 fibertools-rs build ^1.0.1
av1an build ^1.0.0
openapi-tui build ^1.0.0
arcam build ^1.0.0