$ git clone -n http://fedora.riscv.rocks:3000/rpms/gcc.git /var/lib/mock/f40-build-775891-128485/root/chroot_tmpdir/scmroot/gcc
Cloning into '/var/lib/mock/f40-build-775891-128485/root/chroot_tmpdir/scmroot/gcc'...
$ git fetch origin 2a9beec767fd76ad28d466bd8a2b6c2ea0413e92:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/gcc
 * [new ref]         2a9beec767fd76ad28d466bd8a2b6c2ea0413e92 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2a9beec Re-enable bootstrap-lto