$ git clone -n http://git.inferitos.ru/rpms/boost /var/lib/mock/inferit-9_1-bootstrap-build-2994-2707/root/chroot_tmpdir/scmroot/boost
Cloning into '/var/lib/mock/inferit-9_1-bootstrap-build-2994-2707/root/chroot_tmpdir/scmroot/boost'...
$ git fetch origin changed/i9c/boost-1.75.0-8.el9:KOJI_FETCH_HEAD
From http://git.inferitos.ru/rpms/boost
 * [new tag]         changed/i9c/boost-1.75.0-8.el9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8fd58ac import boost-1.75.0-8.el9