$ git clone -n http://git.inferitos.ru/rpms/sphere-release /var/lib/mock/inferit-8_10-bootstrap-build-39458-77434/root/chroot_tmpdir/scmroot/sphere-release
Cloning into '/var/lib/mock/inferit-8_10-bootstrap-build-39458-77434/root/chroot_tmpdir/scmroot/sphere-release'...
$ git fetch origin changed/i8-beta/sphere-release-8.10-0.1.el8:KOJI_FETCH_HEAD
From http://git.inferitos.ru/rpms/sphere-release
 * [new tag]         changed/i8-beta/sphere-release-8.10-0.1.el8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7a3beed 8.10 Beta build