$ git clone -n https://src.fedoraproject.org/rpms/dist-git.git /var/lib/mock/f41-build-3150568-40566/root/chroot_tmpdir/scmroot/dist-git
Cloning into '/var/lib/mock/f41-build-3150568-40566/root/chroot_tmpdir/scmroot/dist-git'...
$ git fetch origin 0bdcf24ac3675e2e42254306af4bab5d02ca17b5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dist-git
 * [new ref]         0bdcf24ac3675e2e42254306af4bab5d02ca17b5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0bdcf24 Update dist-git to 1.18-1