$ git clone -n https://src.fedoraproject.org/rpms/ldapdiff.git /var/lib/mock/f40-build-2726497-73122/root/chroot_tmpdir/scmroot/ldapdiff
Cloning into '/var/lib/mock/f40-build-2726497-73122/root/chroot_tmpdir/scmroot/ldapdiff'...
$ git fetch origin 5a1821b28a977efc84db8f2b342f6b8895c6c2a8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ldapdiff
 * [new ref]         5a1821b28a977efc84db8f2b342f6b8895c6c2a8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5a1821b Clean-up spec file