$ git clone -n https://src.fedoraproject.org/rpms/distcc.git /var/lib/mock/f41-build-side-1-3049430-37886/root/chroot_tmpdir/scmroot/distcc
Cloning into '/var/lib/mock/f41-build-side-1-3049430-37886/root/chroot_tmpdir/scmroot/distcc'...
$ git fetch origin b0efecb1a23cd2d9d68d06eadfe5e531340265e0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/distcc
 * [new ref]         b0efecb1a23cd2d9d68d06eadfe5e531340265e0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b0efecb Patch for Py_ssize_t