$ git clone -n https://src.fedoraproject.org/rpms/tetgen.git /var/lib/mock/f41-build-834050-158043/root/chroot_tmpdir/scmroot/tetgen
Cloning into '/var/lib/mock/f41-build-834050-158043/root/chroot_tmpdir/scmroot/tetgen'...
$ git fetch origin 7577f3a66e60d86fb5cc9205401bf9734e2ef2b7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tetgen
 * [new ref]         7577f3a66e60d86fb5cc9205401bf9734e2ef2b7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7577f3a Modernize spec