$ git clone -n https://src.fedoraproject.org/rpms/ghc-gi-harfbuzz.git /var/lib/mock/f39-build-1983985-43346/root/chroot_tmpdir/scmroot/ghc-gi-harfbuzz
Cloning into '/var/lib/mock/f39-build-1983985-43346/root/chroot_tmpdir/scmroot/ghc-gi-harfbuzz'...
$ git fetch origin 314eab29a3050d16671b34278b139342ab1ff5cd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-gi-harfbuzz
 * [new ref]         314eab29a3050d16671b34278b139342ab1ff5cd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 314eab2 update to 0.0.9