$ git clone -n http://git.inferitos.ru/rpms/gcc-toolset-13-gcc.git /var/lib/mock/inferit-9_3-bootstrap-build-21271-36808/root/chroot_tmpdir/scmroot/gcc-toolset-13-gcc
Cloning into '/var/lib/mock/inferit-9_3-bootstrap-build-21271-36808/root/chroot_tmpdir/scmroot/gcc-toolset-13-gcc'...
$ git fetch origin changed/i9c-beta/gcc-toolset-13-gcc-13.1.1-4.2.el9:KOJI_FETCH_HEAD
From http://git.inferitos.ru/rpms/gcc-toolset-13-gcc
 * [new tag]         changed/i9c-beta/gcc-toolset-13-gcc-13.1.1-4.2.el9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7aa1e74 import gcc-toolset-13-gcc-13.1.1-4.2.el9