$ git clone -n http://git.inferitos.ru/rpms/gmp /var/lib/mock/inferit-8_10-bootstrap-build-37687-75799/root/chroot_tmpdir/scmroot/gmp
Cloning into '/var/lib/mock/inferit-8_10-bootstrap-build-37687-75799/root/chroot_tmpdir/scmroot/gmp'...
$ git fetch origin changed/i8c-beta/gmp-6.1.2-12.el8:KOJI_FETCH_HEAD
From http://git.inferitos.ru/rpms/gmp
 * [new tag]         changed/i8c-beta/gmp-6.1.2-12.el8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7efbb44 import gmp-6.1.2-12.el8