$ git clone -n http://git.inferitos.ru/rpms/rubygem-slim.git /var/lib/mock/inferit-9-epel-build-20651-34439/root/chroot_tmpdir/scmroot/rubygem-slim
Cloning into '/var/lib/mock/inferit-9-epel-build-20651-34439/root/chroot_tmpdir/scmroot/rubygem-slim'...
$ git fetch origin deed67a5ccaf6fe0795d7faf5e0e532058b17e94:KOJI_FETCH_HEAD
From http://git.inferitos.ru/rpms/rubygem-slim
 * [new ref]         deed67a5ccaf6fe0795d7faf5e0e532058b17e94 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at deed67a import rubygem-slim-4.1.0-7.el9