$ git clone -n http://git.inferitos.ru/rpms/firefox /var/lib/mock/inferit-8_10-updates-build-99929-184077/root/chroot_tmpdir/scmroot/firefox
Cloning into '/var/lib/mock/inferit-8_10-updates-build-99929-184077/root/chroot_tmpdir/scmroot/firefox'...
$ git fetch origin changed/i8/firefox-128.9.0-2.el8_10.inferi:KOJI_FETCH_HEAD
From http://git.inferitos.ru/rpms/firefox
 * [new tag]         changed/i8/firefox-128.9.0-2.el8_10.inferi -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dab2ea7 import firefox-128.9.0-2.el8_10