$ git clone -n http://git.inferitos.ru/rpms/postfix /var/lib/mock/inferit-8_8-build-15953-23083/root/chroot_tmpdir/scmroot/postfix
Cloning into '/var/lib/mock/inferit-8_8-build-15953-23083/root/chroot_tmpdir/scmroot/postfix'...
$ git fetch origin changed/i8c/postfix-3.5.8-4.el8:KOJI_FETCH_HEAD
From http://git.inferitos.ru/rpms/postfix
 * [new tag]         changed/i8c/postfix-3.5.8-4.el8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cb902d8 edit changelog for import postfix-3.5.8-4.el8