$ git clone -n http://git.inferitos.ru/rpms/firefox /var/lib/mock/inferit-8_9-updates-build-35637-73356/root/chroot_tmpdir/scmroot/firefox
Cloning into '/var/lib/mock/inferit-8_9-updates-build-35637-73356/root/chroot_tmpdir/scmroot/firefox'...
$ git fetch origin changed/i8/firefox-115.9.1-1.el8_9.inferit:KOJI_FETCH_HEAD
From http://git.inferitos.ru/rpms/firefox
 * [new tag]         changed/i8/firefox-115.9.1-1.el8_9.inferit -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ab99f6a import firefox-115.9.1-1.el8_9