$ git clone -n http://git.inferitos.ru/rpms/shim /var/lib/mock/inferit-8_9-updates-build-39804-79644/root/chroot_tmpdir/scmroot/shim
Cloning into '/var/lib/mock/inferit-8_9-updates-build-39804-79644/root/chroot_tmpdir/scmroot/shim'...
$ git fetch origin changed/i8/shim-15.8-1.el8.inferit:KOJI_FETCH_HEAD
From http://git.inferitos.ru/rpms/shim
 * [new tag]         changed/i8/shim-15.8-1.el8.inferit -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0efa2f4 15.8 Release