$ git clone -n https://src.fedoraproject.org/rpms/why3.git /var/lib/mock/f43-build-side-114891-61022184-6587838/root/chroot_tmpdir/scmroot/why3
Cloning into '/var/lib/mock/f43-build-side-114891-61022184-6587838/root/chroot_tmpdir/scmroot/why3'...
$ git fetch origin eef9515e6d3f9c7585829378f37d5abcbc4cc266:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/why3
 * [new ref]         eef9515e6d3f9c7585829378f37d5abcbc4cc266 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eef9515 Rebuild to fix OCaml dependencies