$ git clone -n https://src.fedoraproject.org/rpms/OpenEXR_Viewers.git /var/lib/mock/f41-build-1017258-17920/root/chroot_tmpdir/scmroot/OpenEXR_Viewers
Cloning into '/var/lib/mock/f41-build-1017258-17920/root/chroot_tmpdir/scmroot/OpenEXR_Viewers'...
$ git fetch origin 5e5f7ae8a23d2ef2243d9cf3bd285077946ab27c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/OpenEXR_Viewers
 * [new ref]         5e5f7ae8a23d2ef2243d9cf3bd285077946ab27c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5e5f7ae Eliminate use of obsolete %patchN syntax (#2283636)