$ git clone -n http://git.inferitos.ru/rpms/gtkmm24 /var/lib/mock/inferit-8_8-build-13983-23060/root/chroot_tmpdir/scmroot/gtkmm24
Cloning into '/var/lib/mock/inferit-8_8-build-13983-23060/root/chroot_tmpdir/scmroot/gtkmm24'...
$ git fetch origin changed/i8c/gtkmm24-2.24.5-6.el8:KOJI_FETCH_HEAD
From http://git.inferitos.ru/rpms/gtkmm24
 * [new tag]         changed/i8c/gtkmm24-2.24.5-6.el8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e6fd8d5 edit changelog for import gtkmm24-2.24.5-6.el8