$ git clone -n http://git.inferitos.ru/rpms/diffutils /var/lib/mock/inferit-8_8-build-15826-23072/root/chroot_tmpdir/scmroot/diffutils
Cloning into '/var/lib/mock/inferit-8_8-build-15826-23072/root/chroot_tmpdir/scmroot/diffutils'...
$ git fetch origin changed/i8c/diffutils-3.6-6.el8:KOJI_FETCH_HEAD
From http://git.inferitos.ru/rpms/diffutils
 * [new tag]         changed/i8c/diffutils-3.6-6.el8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 28744d4 edit changelog for import diffutils-3.6-6.el8