$ git clone -n https://src.fedoraproject.org/rpms/appstream-generator.git /var/lib/mock/f39-build-2421263-60579/root/chroot_tmpdir/scmroot/appstream-generator
Cloning into '/var/lib/mock/f39-build-2421263-60579/root/chroot_tmpdir/scmroot/appstream-generator'...
$ git fetch origin f119da9afca17d588befec1b23d602b0ce86db1a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/appstream-generator
 * [new ref]         f119da9afca17d588befec1b23d602b0ce86db1a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f119da9 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild