$ git clone -n https://src.fedoraproject.org/rpms/python-ufoLib2.git /var/lib/mock/f39-build-1917168-42925/root/chroot_tmpdir/scmroot/python-ufoLib2
Cloning into '/var/lib/mock/f39-build-1917168-42925/root/chroot_tmpdir/scmroot/python-ufoLib2'...
$ git fetch origin a1b0f2755ade3f7a4c8fff82d6c90471daaa4833:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-ufoLib2
 * [new ref]         a1b0f2755ade3f7a4c8fff82d6c90471daaa4833 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a1b0f27 rewrite spec for pyproject macros