$ git clone -n https://src.fedoraproject.org/rpms/flyingsaucersattack.git /var/lib/mock/f41-build-816034-14284/root/chroot_tmpdir/scmroot/flyingsaucersattack
Cloning into '/var/lib/mock/f41-build-816034-14284/root/chroot_tmpdir/scmroot/flyingsaucersattack'...
$ git fetch origin fd41ab405ec2e2d268bd4d854bf34811867e4a0d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/flyingsaucersattack
 * [new ref]         fd41ab405ec2e2d268bd4d854bf34811867e4a0d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fd41ab4 Eliminate use of obsolete %patchN syntax (#2283636)