$ git clone -n https://src.fedoraproject.org/rpms/python2.7.git /var/lib/mock/f41-build-side-1-2768751-32099/root/chroot_tmpdir/scmroot/python2.7
Cloning into '/var/lib/mock/f41-build-side-1-2768751-32099/root/chroot_tmpdir/scmroot/python2.7'...
$ git fetch origin 3248aca6678f2b040dcab600e5f94dac2c0c5276:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python2.7
 * [new ref]         3248aca6678f2b040dcab600e5f94dac2c0c5276 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3248aca https://fedoraproject.org/wiki/Changes/RetirePython2.7