$ git clone -n https://src.fedoraproject.org/rpms/lacewing.git /var/lib/mock/f41-build-1144807-21156/root/chroot_tmpdir/scmroot/lacewing
Cloning into '/var/lib/mock/f41-build-1144807-21156/root/chroot_tmpdir/scmroot/lacewing'...
$ git fetch origin 1565b4fe8e33b2bbc1a4e4c56f8f29e2502edea9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lacewing
 * [new ref]         1565b4fe8e33b2bbc1a4e4c56f8f29e2502edea9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1565b4f Eliminate use of obsolete %patchN syntax (#2283636)