abuild fails due to 'git log' returns colorized hash

Hi! I have

[color]
	ui = always

in my .gitconfig, so git_last_commit call in abuild returns colorized commit hash, which causes git_last_commit_epoch call to fail with:

fatal: bad revision '?[33m631c7968043f58ee3afb1be3d2fc40886cda7793?[m'

Note term color codes ?[33m ?[m above.

Maybe instead of git log --format=oneline|awk '{print $1}' git_last_commit could use git log --format=%H, which returns non-colorized hash?