$ git clone -n http://git.inferitos.ru/rpms/mrtg /var/lib/mock/inferit-8_8-build-21174-35131/root/chroot_tmpdir/scmroot/mrtg
Cloning into '/var/lib/mock/inferit-8_8-build-21174-35131/root/chroot_tmpdir/scmroot/mrtg'...
$ git fetch origin changed/i8c/mrtg-2.17.7-1.el8:KOJI_FETCH_HEAD
From http://git.inferitos.ru/rpms/mrtg
 * [new tag]         changed/i8c/mrtg-2.17.7-1.el8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7d2a6b8 edit changelog for import mrtg-2.17.7-1.el8