$ git clone -n http://fedora.riscv.rocks:3000/rpms/ghc.git /var/lib/mock/f38-build-side-42-init-devel-902252-28592/root/chroot_tmpdir/scmroot/ghc
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-902252-28592/root/chroot_tmpdir/scmroot/ghc'...
$ git fetch origin 3c4d4b0111ed1575bd9db73602c677eacf3917ed:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/ghc
 * [new ref]         3c4d4b0111ed1575bd9db73602c677eacf3917ed -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3c4d4b0 Set it to -j1