$ git clone -n http://git.inferitos.ru/rpms/gtkmm30 /var/lib/mock/inferit-8_8-build-13984-23060/root/chroot_tmpdir/scmroot/gtkmm30
Cloning into '/var/lib/mock/inferit-8_8-build-13984-23060/root/chroot_tmpdir/scmroot/gtkmm30'...
$ git fetch origin changed/i8c/gtkmm30-3.22.2-3.el8:KOJI_FETCH_HEAD
From http://git.inferitos.ru/rpms/gtkmm30
 * [new tag]         changed/i8c/gtkmm30-3.22.2-3.el8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ac56078 edit changelog for import gtkmm30-3.22.2-3.el8