$ git clone -n https://src.fedoraproject.org/rpms/osgearth.git /var/lib/mock/f41-build-812166-147723/root/chroot_tmpdir/scmroot/osgearth
Cloning into '/var/lib/mock/f41-build-812166-147723/root/chroot_tmpdir/scmroot/osgearth'...
$ git fetch origin 5765910dc842a8e0c928caf96f31f5ec1bec020d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/osgearth
 * [new ref]         5765910dc842a8e0c928caf96f31f5ec1bec020d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5765910 Rebuild (gdal)