$ git clone -n https://src.fedoraproject.org/rpms/python-mechanize.git /var/lib/mock/f41-build-1031451-18515/root/chroot_tmpdir/scmroot/python-mechanize
Cloning into '/var/lib/mock/f41-build-1031451-18515/root/chroot_tmpdir/scmroot/python-mechanize'...
$ git fetch origin d1666a4ded2976e3964f002606a7f4cd7135680c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-mechanize
 * [new ref]         d1666a4ded2976e3964f002606a7f4cd7135680c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d1666a4 Update to version 0.4.10